Question

(3х -1)(3х +1) = 9х – 1.

Answer 1

(3х -1)(3х +1) = 9х – 1
9x²-1-9x+1=0
9x(x-1)=0|:9
x=0  или   х-1=0
                 х=1
Ответ: 0; 1

Answer 2

9x^2+3x-3x-1=9x-1
9x^2-9x=0
9(x-1)=0
x-1=0
x=1