Question

Phân tích thành nhân tử:

a) 2x²\(-\)xy\(-\)x

b) \(\dfrac{3}{4}\)xy+\(\dfrac{3}{4}\)x²y\(-\)\(\dfrac{3}{4}\)xy²

c) x (x\(-\)2)+y (2\(-\)x)

d) x (3\(-\)2x)+6\(\)\(-\)4x

Answer 1

b) \(\dfrac{3}{4}xy+\dfrac{3}{4}x^2y-\dfrac{3}{4}xy^2\Leftrightarrow\dfrac{3}{4}xy+\dfrac{3}{4}xy\left(x-y\right)\Leftrightarrow\dfrac{3}{4}xy\left(x-y+1\right)\)

c) \(x\left(x-2\right)+y\left(2-x\right)\Leftrightarrow x\left(x-2\right)-y\left(x-2\right)=\left(x-y\right)\left(x-2\right)\)

d) \(x\left(3-2x\right)+6-4x\Leftrightarrow x\left(3-2x\right)+2\left(3-2x\right)\Leftrightarrow\left(x+2\right)\left(3-2x\right)\)