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OpenStudy (anonymous):
please show me how to do these kind of problems find the sum or difference (8x^2 + 7) - (3x^2 - 2)
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OpenStudy (anonymous):
you can add the coefficients of like terms. = 5x^2 + 9
OpenStudy (anonymous):
8x^2 minus 3x^2 is where you get 5x^2. Then you add 7 and 2 and get 9. So its 5x^2+9
OpenStudy (anonymous):
The minus sign in the middle cancels out the minus 2, so you would add them instead of subtracting
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