Question

Answer 1

Bài 2: 

a: \(\left(2x+3y\right)^2=4x^2+12xy+9y^2\)

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

 

Answer 2

Bài 4: 

a: \(x^3-2x^2+x=x\left(x-1\right)^2\)

b: \(5\left(x-y\right)-y\left(x-y\right)=\left(x-y\right)\left(5-y\right)\)

c: \(x^2-12x+36=\left(x-6\right)^2\)

d: \(4x^2+12x+9=\left(2x+3\right)^2\)