Difference of 9p3q2 and 13p3q2

If the discriminant if a quadratic equation is 4 which statement describes the roots?

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

Rewrite so the subject can be y in the formula d=m-y/y+n