Question

Answer 1

Bài 1:

a) \(=3\left(x-2y\right)\)

b) \(=x^2\left(\dfrac{2}{5}+5x+y\right)\)

c) \(=7xy\left(2x-3y+4xy\right)\)

d) \(=\dfrac{2}{5}\left(y-1\right)\left(x-y\right)\)

e) \(=2\left(x-y\right)\left(5x+4y\right)\)

Bài 2:

a) \(=\left(x+3\right)^2\)

b) \(=-\left(x^2-10x+25\right)=-\left(x-5\right)^2\)

c) \(=\left(2x-\dfrac{1}{2}\right)\left(4x^2+x+\dfrac{1}{4}\right)\)

d) \(=\left(\dfrac{1}{5}x-8y\right)\left(\dfrac{1}{5}x+8y\right)\)