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OpenStudy (anonymous):
how can you simplify (a^2-3a-5) - (-a^2-7a+4)
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OpenStudy (owlfred):
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OpenStudy (slaaibak):
Just add them. multiply the - in the second bracket so it becomes: a^2 -3a -5 + a^2 + 7a -4 so it's 2a^2 + 4a - 9
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