Question

Mn ơi giúp em 3 câu này vs ah

Answer 1

`a, 2x^3 + 4x^2 + 2x`

`= 2x(x^2 + 2x + 1)`

`= 2x(x+1)^2`

`b, = (x-y)^2 - 1`

`= (x-y-1)(x-y+1)`

Answer 2

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