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OpenStudy (anonymous):
81c^4d^4-16t^4
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OpenStudy (anonymous):
why would that not be 9c^2d^2+4t^2 9c^2d^2 -4t^2
OpenStudy (anonymous):
it could be a difference of cubes
OpenStudy (anonymous):
well scratch that
OpenStudy (anonymous):
your right
OpenStudy (anonymous):
it is what you said it was
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OpenStudy (anonymous):
now just apply difference of squares to the 9c^2d^2-4t^2
OpenStudy (anonymous):
book says answer is (9c^2d^2+4t^2)(3cd+2t)(3cd-2t)
OpenStudy (anonymous):
why did the second equation get broken down?
OpenStudy (anonymous):
|dw:1350775938394:dw|
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