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OpenStudy (anonymous):
(8v-7) (8v+7)
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OpenStudy (hoblos):
(a-b)(a+b) = a^2 - b^2 so (8v-7) (8v+7) = (8v)^2 - 7^2 = 64v^2 -49
OpenStudy (anonymous):
64y^2-49
OpenStudy (anonymous):
64v^2 -49
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