Posted by **Justin** on Tuesday, January 17, 2012 at 10:35pm.

(3x to the fourth - 5x squared - 6x +5) + (-4x cubed + 6x squared + 7x -1)

- Algebra I -
**John**, Tuesday, January 17, 2012 at 10:36pm
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- Algebra I -
**Steve**, Wednesday, January 18, 2012 at 4:49am
Ok, so we have

(3x^4 - 5x^2 - 6x + 5) + (-4x^3 + 6x^2 + 7x - 1)

add it up, collecting like powers:

3x^4 - 4x^3 + (-5 + 6)x^2 + (-6 + 7)x + (5 + -1)

= 3x^4 - 4x^3 + x^2 + x + 4

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