Question

2x² + 4x + 2 - 2y²(phân tích thành nhân tử)

Answer 1

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

Answer 2

2x² + 4x + 2 - 2y² = 2(x² + 2x + 1 - y²)