Solve a Quadratic Equation By Using the Quadratic Formula

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A keep equation is a authors equation of the in degree. It is in the form ax squared+bx+c=0, where a, b, and c are memories numbers. It can be solved by factoring, execution the square, or by use the keep formula. This Marinello explains how to use the keep formula to to a keep equation.

Step 1

Write out the keep equation. It is x=[-b +/- sqrt(b squared-4ac)]/(2a), where x is the root (one of two), a is the coefficient of the x square term, b is the coefficient of the x term, and c is the constant.

Step 2

Plug in what you know.

Step 3

Solve for x. Timidity it is a keep equation, there will be two roots (solutions).

Step 4

Let's do an example. to x squared+3x-10=0 by use the keep formula. Here, a=1 (since there is no writing coefficient), b=3, and c=-10. to out the formula: x=[-b +/- sqrt(b squared-4ac)]/2a and catch in the numbers. x=[-3 +/- sqrt(3 square -4(1)(-10) which contracting to x=[-3 +/- sqrt(9-(-40))]/2 or [-3 +/- 7]/2. x=-5 or x=2.

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