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Mathematics 14 Online
OpenStudy (anonymous):

factor y^5-81y

jhonyy9 (jhonyy9):

y(y4 -(3)4) =y((y2)2 -((3)2)2 =y((y2 -(3)2)(y2 +(3)2))

jhonyy9 (jhonyy9):

y(y2 -9)(y2 +9)

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