Quadratic Formula Calculator

Simplify quadratic equations effortlessly with our Quadratic Calculator. Ensure accuracy in solving for roots and coefficients, making complex math tasks straightforward.

quadratic formula calculator

Enter Information:
= 0
3x2 + 5x + 2


Fill the calculator form and click on Calculate button to get result here
The coefficients of quadratic equation are:

Struggling to solve quadratic equations can make math homework feel like the most difficult task. But with the right tool, finding solutions becomes straightforward and efficient. This guide will help you learn about the Quadratic Formula Calculator.


Understanding the Quadratic Formula Calculator

Understand algebra effortlessly with our Quadratic Formula Calculator. Just enter your numbers, and it not only gives you the answers but also shows you how it’s done, helping you understand and improve your math skills step by step.

Solving second-degree polynomial equations

Second-degree polynomial equations, also called quadratic equations, look like ax^2 + bx + c = 0. To solve them, you plug the numbers for a, b, and c into the quadratic formula. This special formula helps you find two solutions that make the equation true.

These are where the curve of the equation crosses the x-axis on a graph.

You can use a calculator to get these answers quickly. Type in your a, b, and c values from your equation. The calculator uses the formula to give you both answers for x. It shows each step so you can see how it gets to those solutions.

This way, even if math is hard for you, solving these equations becomes simple!

Entering variable coefficients for step-by-step solutions

 The Quadratic Formula Calculator is such a tool that allows you to find solutions quickly and accurately.

  • First, you will need the coefficients of your quadratic equation. These are the numbers in front of the \( x^2 \), \( x \), and constant term.
  • Look for the input fields on the calculator labeled ‘a’, ‘b’, and ‘c’. These represent the coefficients in your equation \( ax^2 + bx + c = 0 \).
  • Type in the value for ‘a’ (the coefficient of \( x^2 \)) into its field. This number cannot be zero because then it wouldn’t be a quadratic equation anymore.
  • Next, put in the value for ‘b’ (the coefficient of \( x \)). If there is no \( x \) term, just enter zero.
  • Enter the constant term, which is ‘c’, into its respective field.
  • Press the calculate or solve button. The calculator will use these values to start finding solutions step by step.
  • You’ll see it complete the square as part of finding the solution. This means it will rearrange the equation to make it easier to solve.
  • The calculator displays two roots after solving. These can be real numbers or complex numbers depending on your equation.
  • If you entered everything correctly but got an error message, check for any mistakes like typing letters instead of numbers or using signs (+/-) incorrectly.

The Quadratic Formula and Its Application

The quadratic Formula stands as a cornerstone in solving second-degree equations with greater efficiency.  

Form of the quadratic equation

quadratic equation looks like ax^2 + bx + c = 0, where a, b, and c are numbers. “a” can’t be zero because then the equation wouldn’t be quadratic anymore. People use this form to solve for x which means finding the values that make the equation true.

You might see different types of quadratic equations too. They could be in standard form like we just talked about or changed around a bit into what’s called vertex or factored forms.

Each one has its own way of showing us how graphs and solutions work but they all give you the same answers in the end.

Calculation of roots using the quadratic formula

Calculating the roots of a quadratic equation becomes easy with the quadratic formula. This formula helps us find out where the equation touches or crosses the x-axis.

Analysis of the solution using the discriminant

The discriminant tells us about the roots of a quadratic equation. You find it by using D = B² – 4AC, where A, B, and C are numbers from the equation ax^2 + bx + c = 0. This number helps you see what kind of answers you will get.

If the discriminant is more than zero, there are two different real roots. When it’s exactly zero, there’s just one real root. But if it’s less than zero, the roots are not real numbers—they’re complex or imaginary.

Knowing about the discriminant is like having a secret clue to solve equations. It lets you predict how the graph of your quadratic will look without even seeing it! Will it touch the x-axis at one point or cross over at two points? Or maybe not touch the x-axis at all? The discriminant can give you these answers fast and help make math easier for you to understand and use every day! Now you can Solve for the length of the sides of a right triangle using our Pythagorean Theorem Calculator.

Features of the Calculator

The Quadratic Formula Calculator is engineered to elevate the user experience with a suite of functionalities designed for comprehensive problem-solving. It seamlessly integrates detailed computations and visual aids, ensuring that both students and educators have access to a robust educational tool for mastering quadratic equations.

Step-by-step solutions

Understanding how to solve tricky math problems is important. Our Quadratic Formula Calculator helps you learn by showing each step.

  1. First, enter the values for A, B, and C from your equation ax^2 + bx + c = 0.
  2. Click the ‘Calculate’ button to start solving.
  3. The calculator first checks your equation to make sure it’s written right.
  4. It then uses the quadratic formula X = ( – B ± √(B² – 4AC)) / 2A.
  5. You will see how it flips the sign of B to negative.
  6. Next, it works on the part under the square root, B² – 4AC, which is called the discriminant.
  7. If this number is positive, you get real solutions; if zero, just one; and if negative, no real solutions.
  8. Then it divides by 2A to find the final answers for X.
  9. These answers are the roots or where your parabola touches or crosses the x-axis.

Graphical representation of the equation

You’ll see your equation come to life with the quadratic formula calculator‘s graph feature. Just type in the coefficients for a, b, and c from your ax^2 + bx + c = 0 equation. The calculator draws a curve showing where your quadratic equation makes a parabola on the graph.

This picture helps you see how the roots of equations look and where they touch the x-axis.

The curve also gives clues about other important parts of your math problem. You can find the line called an axis of symmetry right down the middle of the parabola. It shows how each side is a mirror image – balanced and equal.

With this visual aid, spotting patterns in complex polynomials becomes easier and helps you understand math better! You can also find the length of an arc with our Arc Length Calculator.

Option for different forms of the quadratic equation

Our Quadratic Formula Calculator is smart. It lets you put in a quadratic equation in more than one way. You can enter it in standard form, which looks like ax^2 + bx + c = 0. This is the most common way people see these equations.

If your equation is already simpler and does not have the ‘B’ term, solve it quickly using the square root property.

Some users might prefer to use the vertex or factored forms of an equation. They find this easier because they can see different parts of the math problem better. The calculator handles these without trouble too.

So no matter how your teacher taught you or what your textbook shows, our calculator fits your needs. You simply choose how you want to input your numbers and let it do its magic solving for x!


Table 1: Key Elements of the Quadratic Formula

Element Description
a Coefficient of the x^2 term
b Coefficient of the x term
c Constant term
± Represents the two possible solutions
√(b^2 – 4ac) Discriminant, determines the nature of the solutions

Table 2: Discriminant Values and Solutions

Discriminant (b^2 – 4ac) Nature of Solutions Example
Positive Two distinct real solutions x1 = (-5 + √49) / 2, x2 = (-5 – √49) / 2
Zero One real solution (repeated root) x = (-3 + √0) / 2
Negative Two complex solutions x1 = (-2 + √(-8)) / 2, x2 = (-2 – √(-8)) / 2


  • Example 1: Solve the equation 2x^2 + 5x – 3 = 0
    • a = 2, b = 5, c = -3
    • x = (-5 ± √(5^2 – 4 * 2 * -3)) / (2 * 2)
    • x = (-5 ± √37) / 4
  • Example 2: Solve the equation x^2 + 4x + 4 = 0
    • a = 1, b = 4, c = 4
    • x = (-4 ± √(4^2 – 4 * 1 * 4)) / (2 * 1)
    • x = (-4 ± 0) / 2
    • x = -2 (repeated root)


1. Why is completing the square important for using a quadratic formula calculator?

Completing the square is a step to find out what number makes ax^2 + bx into a perfect square, which helps you understand how calculators get to an answer using the quadratic formula.

2. Can a quadratic formula calculator solve systems of equations?

Yes, it can help when you have more than one equation with variables that need answers that make all equations true at once. These are often called systems of equations.

3. Do I need to know about exponents and the order of operations to use this type of calculator?

Knowing about exponents and following the correct order when solving math problems (order of operations) will help you understand how a quadratic formula calculator works out its answers.

4. Does this kind of math have anything to do with real-life situations like acceleration due to gravity?

Absolutely! When scientists calculate things like acceleration due to gravity, they’re working with formulas similar to ax^2+bx+c=0 that tell us how fast something speeds up as it falls.

5. Can the Quadratic Formula Calculator handle all types of quadratic equations?

Yes, the calculator is versatile and can handle quadratic equations of any form, ensuring accurate solutions for both real and complex roots.

6. Is the Quadratic Formula Calculator free to use?

Absolutely! Our Quadratic Formula Calculator is completely free, providing an accessible and user-friendly way to solve quadratic equations without any cost.

7. How accurate are the results provided by the Quadratic Formula Calculator?

The calculator provides highly accurate solutions based on the quadratic formula. It’s a reliable tool for obtaining precise results for quadratic equations.

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