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OpenStudy (anonymous):
144-9r^2 factored out
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OpenStudy (anonymous):
what?
OpenStudy (anonymous):
(12)^2 - (3r)^2
OpenStudy (anonymous):
\[r^2(16+1)\]
OpenStudy (anonymous):
\[(12-3r)(12+3r)\]
OpenStudy (anonymous):
sorry , got it wrong
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OpenStudy (anonymous):
\[9r^2(16+1)\]
OpenStudy (anonymous):
sorry , got it wrong
OpenStudy (anonymous):
no sorry ignore me :D
OpenStudy (anonymous):
9 ( 16 - r^2 )
OpenStudy (anonymous):
9 ( (4)^2 - (r)^2 )
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OpenStudy (anonymous):
\[9(16-r^2) sorry\]
OpenStudy (anonymous):
9 ( 4+r) (4-r)
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