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OpenStudy (anonymous):
Find the sum. (13x2 + 5x) + 8x2 = 26x2 26x5 20x2 + 5x 21x2 + 5x
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OpenStudy (campbell_st):
collect the like terms (13 + 8)x^2 + 5x = just simplify it
OpenStudy (anonymous):
It would be D. 21x2+5x
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