Simplify the expression (5r - 7)(9r^2-4r-8)

For this problem, you will need to foil. Multiply each term in the first expression (5r-7) by each term in the second expression (9r^2-4r-8)

When we foil, we get:

Combine like terms:

This is your final answer since you can do nothing further to simplify.

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11