Solve for x in the equation x^2 + 4x - 4 = 8
2 answers:
x^2+4x-4=8
Subtract 8 from both sides: x^2+4x-4-8=8-8
Simplify: x^2+4x-12=0
Solve with the quadratic formula: For a=1,b=4,c=-12: x1,2= -4+- (4^2-4*1(-12))sqrt over 2*1
x= 2 and x=-6
Subtracting 8 from both sides of the equation gives
x^2 + 4x - 12 = 0
(x + 6)(x - 2)= 0
x = -6, 2 answer
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