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Mathematics 10 Online
OpenStudy (anonymous):

169x^2-25y^2

myininaya (myininaya):

this is a difference of squares i guess you need help factoring it? \[a^2-b^2=(a-b)(a+b)\]

OpenStudy (solomonzelman):

Just adding that in your case, \[\sf~~~a=13x~~~~~~b=5y\]

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