Question

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

Answer 1

х²-1=2(х²-6х+9)-х²

х²-1=2х²-12х+18-х²

х²-1=х²-12х+18

-1= -12х+18

12х=18+1

12х=19

х=19/12

Answer 2

x²-1²=2(x²-6x+9)-x²
x²-1=2x²-12x+18-x²
x²+x²-2x²+12x=18+1
12x=19
x=12/19