SOLUTION: Solve. (x+7)squared = 13 x squared

SOLUTION: Solve. (x+7)squared = 13 x squared - 4x = 12

Question 122758: Solve.

(x+7)squared = 13
x squared - 4x = 12
Answer by checkley71(8403) (Show Source): You can put this solution on YOUR website!
(X+7)^2=13
X^2+14X+49-13=0
X^2+14X+36=0

X=(-14+-SQRT[14^2-4*1*36])/2*1
X=(-14+-SQRT[196-144])/2
X=(-14+-SQRT52])/2
X=(-14+-7.2)/2
X=(-14+7.2)/2
X=-6.8/2
X=-3.4 ANSWER.
X=(-14-7.2)/2
X=-21.2/2
X=-10.6 ANSWER.
-----------------------------------------------
X^2-4X-12=0
(X-6)(X+2)=0
X-6=0
X=6 ANSWER.
X+2=0
X=-2 ANSWER.

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