Answer:

Step-by-step explanation:
(5x^3+4x^2)−(6x^2−2x−9)
To find the opposite of 6x^2−2x−9 find the opposite of each term.
5x^3+4x^2−6x^2+2x+9
Combine 4x^2 and 6x^2 to get −2x^2.
5x^3-2x^2+2x+9
we can use synthetic division
and then we can find quotient
we can see in the image
we will get



so, we get
.............Answer
318.50 x .30 = 95.55 discount.
318.50 - 95.55 = 222.95 is the total bill