Answer:
third option
Step-by-step explanation:
Given
x² + 4x - 4 = 0 ( add 4 to both sides )
x² + 4x = 4
Using the method of completing the square
add ( half the coefficient of the x- term )² to both sides
x² + 2(2)x + 4 = 4 + 4, that is
(x + 2)² = 8 ( take the square root of both sides )
x + 2 = ±
= ± 2
( subtract 2 from both sides )
x = - 2 ± 2
F(x) = x² - 10x - 24 , 24= (-12)*2 and -12+2 =-10
f(x) = (x-12)(x+2)
Answer A. f(x) = (x-12)(x+2)
A. x=34
2 x 17 = 34
34/2 = 17