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Because it's part of the quadratic equation formula in finding the roots of a quadratic equation.

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Q: Why do you use square roots to solve quadratic equations?
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Related questions

Can all quadratics be solved by completing the square?

Completing the square is one method for solving a quadratic equation. A quadratic equation can also be solved by factoring, using the square roots or quadratic formula. Solving quadratic equations by completing the square will always work when solving quadratic equations-You can also use division or even simply take a GCF, set the quantities( ) equal to zero, and subtract or add to solve for the variable

How do you formulate quadratic equation that can be solve by extracting square roots?

By using the quadratic equation formula

How do you solve quadratic equations by finding square roots?

you use difference of squaresex. X^2-4 can be factored out to (x+2)(x-2)you now have the zeros in your equation much easier

Do you find principle square roots when you solve equations or expressions?

Yes, sometimes you need to do that.

In mathematics how does one use the quadratic formula?

The Quadratic formula in mathematics is used to solve quadratic equations in algebra. The simplest way to solve these equations is to set each of the factors to zero and then solve each factor separately.

How do you solve quadratic equations by graphing?

josh hutcherson

What is a solution of a quadratic?

A quadratic function is ax2+bx+c You can solve for x by using the quadratic formula, which, as the formula requires the use of square roots, would be tricky to put here.

What is the quadratic formula used for?

The quadratic formula is used all the time to solve quadratic equations, often when the factors are fractions or decimals but sometimes as the first choice of solving method. The quadratic formula is sometimes faster than completing the square or any other factoring methods. Quadratic formula find: -x-intercept -where the parabola cross the x-axis -roots -solutions

How did the Babylonians solve quadratic equations?


How do you solve simultaneous quadratic equations?

Graphically might be the simplest answer.

How do you solve a quadratic equation graphically?

The roots of the quadratic equation are the x-intercepts of the curve.

What is the quadratic formula for?

The quadratic formula is used to solve the quadratic equation. Many equations in which the variable is squared can be written as a quadratic equation, and then solved with the quadratic formula.