Question

The solution of(x-1)²=9 is equal to

Answer 1

Step-by-step explanation:

(x-1)²=9

x²-2x+1=9

x²-2x+1-9=0

x²-2x-8=0

x²-4x+2x-8=0

x(x-4)+2(x-4)=0

(x-4)(x+2)=0

x-4=0; x+2=0

x=4; x=-2