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Math and Arithmetic

What are some examples of how to use the quadratic formula?


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Wiki User
May 01, 2010 6:37AM

For a quadratic equation in the form: ax² + bx + c = 0

The quadratic formula comes from completing the square of the quadratic equation that gives you a result of x=-b±√b²-4ac divided by 2a.

Using a simple quadratic equation like x² + 2x + 1 = 0

a=1; b=2; c=1

x=-2±√2²-4(1)(1) divided by 2a

x=-2±√4-4 divided by 2a (4 - 4 = 0 and the square root of 0 is 0)

Therefore, x=-2