not much factoring here.
5(x-2)^2 = 125
(x-2)^2 = 25
x-2 = ±5
x-2 = +5: x = 7
x-2 = -5: x = -3
Solve the equation below for x. What is the solution set?
5(x-2)^2=125
Answer : x=-3 or x=7
I know I need to do factoring, just forget how to set it up. I also can't figure out where this -20x+20 came from. Thanks for the assistance.
2 answers
as for the -20x+20,
5(x-2)^2 = 5(x^2-4x+4)
= 5x^2-20x+20
5(x-2)^2 = 5(x^2-4x+4)
= 5x^2-20x+20
1 answer