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Mathematics 16 Online
OpenStudy (anonymous):

what is the simplified form of this ?

OpenStudy (anonymous):

|dw:1334661164991:dw|

OpenStudy (anonymous):

\[x ^{4}-81=(x ^{2}-9)(x ^{2}+9)=(x-3)(x+3)(x ^{2}+9)\] rest it's easy...:)

OpenStudy (anonymous):

|dw:1334661385527:dw|

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