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OpenStudy (anonymous):
Find the product:(x^2-2y)(x^2+2y)
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OpenStudy (saifoo.khan):
\[x^4-4 y^2 \]
OpenStudy (anonymous):
since \[(a+b)(a-b)=a^2-b^2\] therefore \[(x^2-2y)(x^2+2y)=(x^2)^2-(2y)^2\] \[x^4-4y^2\]
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