SOLUTION: The area of a rectangular deck can be modeled by f(x) = 2x3 + 30x2 6x 90. If x + 15 represents the width, which expression represents the length? (Points : 1) 2x2 + 2

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Question 855839: The area of a rectangular deck can be modeled by f(x) = 2x3 + 30x2 6x 90. If x + 15 represents the width, which expression represents the length?
(Points : 1)
2x2 + 21
2x2 + 6
2x2 + 9
2x2 + 45
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

f(x) = 2x3 + 30x2 + 6x +90   (x+15) a factor

Using Synthetic Division to find other(s)

-15	2	30	6	90

		-30	0	-90

	2	0	6	0



       (x+15)(2x^2 + 6)