Answer: 63x^3+53x^2+27x-28
Step-by-step explanation:
(7x^2+9x+7) (9x-4)
7x^2 X 9x+7x^2(-4) + 9x X 9x(-4) +7 X 9x +7(-4)
7 X 9x^2x -7 X 4x^2 +9 X 9xx -9 X 4x+7 X 9x-7 X 4
63x^3+53x^2+27x-28
