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Mathematics 11 Online
OpenStudy (anonymous):

Factor x10 - y2.

OpenStudy (callisto):

\[x^{10} - y^2 =(x^{5})^2 - y^2 \]Now apply the identity \(a^2-b^2 = (a+b)(a-b)\) \[(x^{5})^2 - y^2 = (x^5-y)(x^5+y)\] Got it?

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