\(a\left(x-1\right)+b\left(1-x\right)=a\left(x-1\right)-b\left(x-1\right)=\left(x-1\right)\left(a-b\right)\)
a) ( x + 1) + b ( 1 - x )
= ( x + 1 ) - b( x- 1 )
= ( 1 - b )( x- 1 )
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a(x-1) + b(1-x)
= a(x-1) - b(x-1)
= (a-b)(x-1)
Nhấn đúng cho mk nha!!!!!!!!!