SOLUTION: x^2-12x-15

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Question 593543:
x^2-12x-15
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E2-12x-15
ince the factors are not integers we can find the solution by using the quadratic formula
Find the roots of the equation by quadratic formula

a= 1 , b= -12 , c= -15

b^2-4ac= 144 + 60
b^2-4ac= 204
%09sqrt%28%09204%09%29=%0914.28%09
x=%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29
x1=%28-b%2Bsqrt%28b%5E2-4ac%29%29%2F%282a%29
x1=( 12 + 14.28 )/ 2
x1= 13.14
x2=( 12 -14.28 ) / 2
x2= -1.14
(13.14,-1.14)
m.ananth@hotmail.ca