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OpenStudy (anonymous):
Quick algebra question
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OpenStudy (anonymous):
OpenStudy (anonymous):
(x+a)(x+b)=x^2+ ax + bx +ab Plug in appropriate a and b.
hero (hero):
\[(x + 5)(x - 5) = x(x-5) + 5(x - 5) = x^2 \cancel{- 5x} \cancel{+ 5x} - 25 = x^2 - 25\]
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