Question

Giúp mk ngay bây giờ với dg cần gấp

4x²-y²+4x+1

X³-x+y³-y

X²-y²-2x+2y

5x-5y+ax-4y

Answer 1

 TL:

\(4x^2-y^2+4x+1\)

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

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

Answer 2

\(x^3-x+y^3-y\)

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

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

Answer 3

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

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

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