Find the sum of (5x^3 + 3x^2 - 5x + 4) and (8x^3 -5x^2 + 8x + 9).
Question
Asked 5/16/2013 7:14:37 AM
Updated 7/4/2014 8:51:47 AM
Flagged by yeswey [7/4/2014 8:48:02 AM]
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Original conversation
User: Find the sum of (5x^3 + 3x^2 - 5x + 4) and (8x^3 -5x^2 + 8x + 9).

User: direct, inverse, joint, or combined. xy = c

Question
Asked 5/16/2013 7:14:37 AM
Updated 7/4/2014 8:51:47 AM
Flagged by yeswey [7/4/2014 8:48:02 AM]
Rating
3
(5x^3 + 3x^2 - 5x + 4) + (8x^3 -5x^2 + 8x + 9)
= 5x^3 + 3x^2 - 5x + 4 + 8x^3 -5x^2 + 8x + 9
= (5x^3 + 8x^3) + (3x^2 - 5x^2) + (-5x + 8x) + (4 + 9)
= 13x^3 - 2x^2 + 3x + 13
Added 7/4/2014 8:49:40 AM
This answer has been confirmed as correct and helpful.
Confirmed by yumdrea [7/4/2014 3:52:02 PM]
3
xy = c is inverse.
Added 7/4/2014 8:51:47 AM
This answer has been confirmed as correct and helpful.
Confirmed by yumdrea [7/4/2014 3:52:02 PM]

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