Question

Giúp mình với

Answer 1

1: \(=3\cdot x^2\cdot x\cdot y\cdot y^2=3x^3y^3\)

2: \(=-3\cdot2\cdot x^2\cdot x\cdot y^2\cdot y\cdot z=-6x^3y^3z\)

3: \(=2\cdot3\cdot x\cdot x^2\cdot y^2\cdot y=6x^3y^3\)

7: \(=\dfrac{2}{3}\cdot\left(-2\right)\cdot x^2\cdot x\cdot y\cdot y=-\dfrac{4}{3}x^3y^2\)