Question 224459
Let f(x) = (x – 2)2.  Find x such that f(x) = 25
since f(x)=25
(x-2)2 = 25
2x - 4 = 25
2x = 21
x = 21/2


or maybe u are refering to (x-2)^2?
(x-2)^2 = 25
x^2 - 4x + 4 = 25
x^2 - 4x - 21= 0
(x+3)(x-7)=0
x=-3 or x=7


test:
f(-3)=(x-2)^2
25= (-3-2)^2
25 =25 


f(-7)= (x-2)^2
25 = (-7-2)^2
25 = 81 (x=7 is rejected)


x=-3 (ans)