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Mathematics 18 Online
OpenStudy (anonymous):

(x-4y)(5x-9y)

OpenStudy (anonymous):

foil distribute everything in the first parenthesis to everything in the second

mathslover (mathslover):

\[\large{(x-4y)(5x-9y)=x(5x-9y)-4y(5x-9y)}\] \[\huge{5x^2-9xy-20xy+36xy}\] \[\huge{5x^2+7xy}\]

OpenStudy (anonymous):

|dw:1340722186377:dw|

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