Question

How do you simplify `(3x^3)/ (12x^2+ 9x)`?

Answer 1

You can divide 'top'and 'bottom' by the same numbers.

Explanation:

One first condition/restriction is that `x!=0`
or the numerator will be `=0`, which is not allowed.

After that we can divide everything by `3x`

`=x^2/(4x+3)`

Which gives us the next restriction:
since `4x+3` is not allowed to be `=0->x!=-3/4`