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OpenStudy (anonymous):
(9-7x^7)^2
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jimthompson5910 (jim_thompson5910):
(9-7x^7)^2 (9-7x^7)(9-7x^7) (9)(9)+(9)(-7x^7)+(-7x^7)(9)+(-7x^7)(-7x^7) 81-63x^7-63x^7+49x^14 81-126x^7+49x^14 49x^14-126x^7+81 So \[ \Large (9-7x^7)^2 = 49x^{14}-126x^7+81\]
hero (hero):
oops
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