SOLUTION: Use the quadratic formula to solve the following equation. x^2 = –x + 7

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Question 775550: Use the quadratic formula to solve the following equation. x^2 = –x + 7
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
x^2=-x+7
x^2+x-7=0
Find the roots of the equation by quadratic formula
iiiii
a= 1 , b= 1 , c= -7

b^2-4ac= 1 + 28
b^2-4ac= 29
%09sqrt%28%0929%09%29=%095.39%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=( -1 + 5.39 )/ 2
x1= 2.19
x2=%28-b-sqrt%28b%5E2-4ac%29%29%2F%282a%29
x2=( -1 -5.39 ) / 2
x2= -3.19
((2.19,-3.19)