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

2 Answers/Comments

Flagged by yeswey [7/4/2014 8:48:02 AM]

s

Question

Asked 5/16/2013 7:14:37 AM

Updated 7/4/2014 8:51:47 AM

2 Answers/Comments

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

= 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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