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OpenStudy (anonymous):
factoring question: u don't need to solve anything, just tell me if I'm right in something? so i factored 49x^2-81 and got (7x−9)(7x+9) but the only closest answer choice is: (7x+9)(7x−9) Is that the same thing
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OpenStudy (anonymous):
@e.mccormick
OpenStudy (anonymous):
(7x−9)(7x+9) is the same as (7x+9)(7x−9) the reason is that multiplication is commutative. -> ab = ba
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