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OpenStudy (anonymous):
7x2-9x2
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OpenStudy (swag):
-2x^2
sam (.sam.):
7x^(2)-9x^(2) Since 7x^(2) and -9x^(2) are like terms, add -9x^(2) to 7x^(2) to get -2x^(2). -2x^(2)
OpenStudy (anonymous):
thanks so much here is another one
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