Question

 

Phân tích đa thưc sau thành phân tử

a) 6x(x-y)-3(x-y)²

b) 2a(x-1)+b(x-1)-(1-x)

c) 2x(x-2)-(x-2)²+5x(2-x)

Giúp e zới nha!!

 

Answer 1

a) \(6x\left(x-y\right)-3\left(x-y\right)^2\)

\(=3\left(x-y\right)\left(2x-x+y\right)\)

b) \(2a\left(x-1\right)+b\left(x-1\right)-\left(1-x\right)\)

\(=2a\left(x-1\right)+b\left(x-1\right)+\left(x-1\right)\)

\(=\left(x-1\right)\left(2a+b+1\right)\)

c) \(2x\left(x-2\right)-\left(x-2\right)^2+5x\left(2-x\right)\)

\(=2x\left(x-2\right)-\left(x-2\right)^2-5x\left(x-2\right)\)

\(=\left(x-2\right)\left(2x-x+2-5x\right)\)

\(=\left(x-2\right)\left(-4x+2\right)\)