Subtract Polynomials

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Subtract vertically

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

Sep 25th, 2015

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

First arrange the polynomial, leaving gaps as needed

4x^3  -7x

6x^3  +5x  +4

Then change the signs in the second part of the polynomial

4x^3  -7x

-6x^3  -5x  -4

-2x^3  -12x -4

So it will be:

-2x^3-12x-4

which can also be written as 

-2x(x^2-6) - 4


Please let me know if you need any clarification. I'm always happy to answer your questions. rate my answer please.
Sep 25th, 2015

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