Question

How do you simplify `(5x^3z - 5x^2yz)/(5x^2z)` and what are the restrictions?

Answer 1

For the expression `(5x^3z-5x^2yz)/(5x^2z)` to be valid
neither `x` not `z` (nor both) can be equal to zero.

`(5x^3z-5x^2yz)/(5x^2z)`

`((5x^2z)(x) - (5x^2z)(y))/(5x^2z)`

`(cancel((5x^2z))(x-y))/cancel(5x^2z)`

`=x-y`