Simplify:

Question

1: (-12xy2z)(3xy)

2: -12xy2z divided by 3xy

3: 2x(2x - 5)

4: -2x(2x-5)

Answer 1

multiplying: exponents add
dividing: exponents subtract.

1)(-12xy2z)(3xy)
-12*3 ( x¹⁺¹ y^{2+1 z1 )
-36 x2y3z1}

Answer 2

I'm still confused