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Mathematics 15 Online
OpenStudy (anonymous):

Quick algebra question

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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