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OpenStudy (anonymous):
Simplify (7a2 – 11a – 9) + (13a2 + 21a – 3)
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OpenStudy (anonymous):
group the a^2 terms, the a terms and the constant terms: a^2(7+13) + a(-11 + 21) +(-9-3) 20a^2 +10a - 12 2(10a^2 + 5a -6)
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