Question

Solve for x: (x - 9)^2 = 1

Answer 1

take square root of each side; +/-(x-9)=1. start with the positive option --> x-9=1, so x = 10. for the negative option, -(x-9)=1 --> -x+9=1--> -x=-8-->x=8. So there are two answers, x = 10 and x = 8.