Question

2 x ( x − 1 ) − ( 2 x − 1 ) ( x + 2 )

Answer 1

= 2х²-2х-(2х²+4х-х-2)
2х²-2х(2х²+3х-2)
2х²-2х-2х²-3х+2= -2х-3х+2 = -5х+2

Answer 2

To simplify the expression 2x(x-1) - (2x-1)(x+2), we can start by distributing the second term:

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

Therefore, the simplified expression is -5x + 2.