Question

(x - 1)(x + 1) = 2(x - 5)^2 - x(x - 3)

Answer 1

(х-1)(х+1)=2(х-5)^2 - х(х-3)

х^2-1=2(х^2-10х+25)-х^2+3х

х^2-1=2х^2-20х+50-х^2+3х

х^2-1=х^2-17х+50

-1=-17х+50

17х=50+1

17х=51

х=51/17

х=3