10x²-(2x-3)(5x-1)=31 помогите)

Question

10x²-(2x-3)(5x-1)=31 помогите)

Answer 1

10х^2 - ( 2х - 3 )( 5х - 1 ) = 31
( 2х - 3 )( 5х - 1 ) = 10х^2 - 2х - 15х + 3 = 10х^2 - 17х + 3
10х^2 - ( 10х^2 - 17х + 3 ) = 31
10х^2 - 10х^2 + 17х - 3 = 31
17х - 3 = 31
17х = 34
Х = 2