Can you subtract 3x^2+2x-5 from 5x^2+2?


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You can write this like a numerical math problem so the problem is verticle and not horizontal. You line up the like terns so that 5x^2 is above 3x^2, a gap is above 2x, and 2 is above -5. Subtracting changes the signs of the bottom polynomial. Then "add" it to the top as if those are the sighs. So there is 5x^2+-3x^2=2x^2, gap-2x=-2x, 2-(-5)=7, so answer is 2x^2-2x+7.

Answered by Bridget D. -

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