The domain is easiest. You simply need to find the fractions, and exclude any X that makes the denominator zero. So in this case, your domain is everything except X=7.
For range, you are trying to find out what are the possible answers. Usually the best way to do this is to try x=infinity, and x=negative infinity, which here gives you answers of infinity and negative infinity. Since the function is almost continuous, I think your range is any real number.
Answer:
Quadratic trinomial
Step-by-step explanation:
It is a trinomial because it has 3 terms.
Quadratic means the highest exponent is 2.
Answer:
5x² - 11x + 10
Step-by-step explanation:
(8x² - 4x + 1) - (3x² + 7x - 9) =
8x² - 4x + 1 - 3x² - 7x + 9 =
5x² - 11x + 10
