# Math Help - Restrictions on variables part two

1. ## Restrictions on variables part two

for the question $(x^3-3x^2+4x-12) / (y^2+3)$
i found the answer to be x-3

the book states that there are no restrictions for this question
is this right?

2. Yes that is right, look at the denominator again: $y^{2} + 3$.

A square term is always greater than or equal to zero.
And therefore a square term + a positive number must be greater than zero.