Question

(x-1)³-2(1-x)²+(1-x)

Answer 1

( x - 1 )³ - 2.( 1 - x )² + ( 1 - x )

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

= ( x - 1 ).\(\left[\left(x+1\right)^2+2-1\right]\)

= ( x - 1 ).\(\left[\left(x+1\right)^2+1\right]\) = ( x - 1 ).( x² + 2x + 1 + 1 )

=( x - 1 ).(x² + x + x + 1 ) = ( x - 1 ).\(\left[\left(x^2+x\right)+\left(x+1\right)\right]\)

= ( x - 1) . \(\left[x.\left(x+1\right)+\left(x+1\right)\right]\)

= ( x - 1 ). (x + 1)² = ( x² - 1 ).(x + 1)

Answer 2

Xin lỗi bạn nha, mk làm nhầm. Để mk sửa lại sau!!!