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OpenStudy (anonymous):
Factor completely 49x2 – 81 ?
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OpenStudy (anonymous):
Use \(a^2-b^2=(a+b)(a-b).\)
OpenStudy (anonymous):
What..?
OpenStudy (anonymous):
Let \(a^2=49x^2\) and \(b^2=81.\) Now what is \((a+b)(a-b)?\)
OpenStudy (anonymous):
How do I plug it in?
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