Question

Solve. (x – 5)^2 = 4.

Answer 1

x^2 -10x +25 = 4
x^2 -10x + 21=0
(x-7)(x-3) = 0
x=7,3

Answer 2

it's easier to square root both sides since the 4 is a perfect square.
This will give you
(x-5)=2/-2
then add 5 to both sides
x=7/3