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What is the f of x over the g of x when f(x) = − 2x3 + x2 + 16x − 15 and g(x) = x + 3?

−2x2 − 5x + 1
−2x2 + 7x − 5
−2x2 + 7x − 5 − 12 over the quantity of x plus 3
−2x2 − 5x + 1 − 12 over the quantity of x plus 3

Question

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What is the f of x over the g of x when f(x) = − 2x3 + x2 + 16x − 15 and g(x) = x + 3?  

 	
	−2x2 − 5x + 1
	−2x2 + 7x − 5
	−2x2 + 7x − 5 − 12 over the quantity of x      plus 3
	−2x2 − 5x + 1 − 12 over the quantity of x plus 3

kpop4life123 · Answer

factor out x+2 from 7x2+14x and note that x3+8 = x3+2^3 = (x+2)(x2-2x+4)

agl202 · Answer

Nvm.. I got it. It's B. Thx anyways! ;)