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OpenStudy (anonymous):
I can't figure out how to factor this (81x^2 - 4y^2)
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OpenStudy (mertsj):
It is the difference of two squares:
OpenStudy (mertsj):
\[a^2-b^2=(a-b)(a+b)\]
OpenStudy (anonymous):
I still don't get how to find the difference of the 2 squares??
OpenStudy (mertsj):
|dw:1389834018044:dw|
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