Question

Giải hộ vs!!

Answer 1

từ hoc247 sang bên đây

Answer 2

3: \(=\left(x+3\right)\left(x^2-3x+9\right)\)

9: \(=\left(x-y\right)^2-9=\left(x-y-3\right)\left(x-y+3\right)\)

10: \(=25-\left(x-2y\right)^2\)

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

2: \(=6xy\left(y-2x\right)\)

7: \(=y\left(x+1\right)+\left(x+1\right)=\left(x+1\right)\left(y+1\right)\)