Factor 49v^2-64u^2

Rewrite 49v2 as (7v)2.
Rewrite 64u2 as (8u)2.
Since both terms are perfect squares, factor using the difference of squares formula, a2-b2=(a+b)(a-b) where a=7v and b=8u.
Multiply 8 by -1.
Factor 49v^2-64u^2

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