(x-6)(x+6)-(2x-3)(х-1)=6-x²

Question

(x-6)(x+6)-(2x-3)(х-1)=6-x²

Answer 1

( Х - 6 )( Х + 6 ) - ( 2х - 3 )( Х - 1 ) = 6 - х^2
Х^2 - 36 - ( 2х^2 - 2х - 3х + 3 ) - 6 + х^2 = 0
2х^2 - 42 - 2х^2 + 5х - 3 = 0
5х = 45
Х = 9