Question

To subtract two rational expressions that have a common denominator, you simply _____ the numerators.

Answer 1

The answer is subtract.

For example:

$\frac{3x^2 - 3}{x+2} - \frac{x^2+6}{x+2}$

$\frac{3x^2 - 3-x^2-6}{x+2}$

$\frac{2x^2-9}{x+2}$