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OpenStudy (anonymous):
Completely factor the following expression: 49y²– 81z²
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OpenStudy (mayankdevnani):
(7y)^2-(9z)^2
OpenStudy (anonymous):
use \(a^2-b^2=(a+b)(a-b)\) with \(a=7y,b=9z\)
OpenStudy (mayankdevnani):
a^2-b^2=(a+b)(a-b)
OpenStudy (mayankdevnani):
(7y+9z)(7y-9z)
OpenStudy (mayankdevnani):
ok @sharron482
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OpenStudy (anonymous):
thank you
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