Answer:
14x^7 - 56x^6 - 126x^5 + 35x^4 - 140x^3 - 315x^2
Step-by-step explanation:
(7x^2)(2x^3+5)(x^2-4x-9)
(14x^5+35x^2)(x^2-4x-9)
14x^7 -56x^6 - 126x^5 + 35x^4 -140x^3 - 315x^2
I don't see a correct answer option.
The one written as:
O 14x7-56x8-126x5+35x4-140X3-315x2
comes the closest, but it is not exact. I get 56x^6, not 56x^8.
