SOLUTION: x^2+12x-7

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: x^2+12x-7      Log On


   

Question 131672: x^2+12x-7
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
x^2+12x-7
Using the quadratic equation:x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+ we get:
x=(-12+-sqrt[12^2-4*1*-7])/2*1
x=(-12+-sqrt[144+28])/2
x=(-12+-sqrt[172)/2
x=(-12+-13.115)/2
x=(-12+13.115)/2
x=1.115/2
x=.557 answer.
x=(-12-13.115)/2
x=-25.115/2
x=-12.557 answer.