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Mathematics 19 Online
OpenStudy (anonymous):

Multiply (4-x)(5-3x) =

OpenStudy (anonymous):

3x^2 -17x +20

OpenStudy (anonymous):

you have to FOIL. Multiply Front. Outer. Inner. Last. (:

jimthompson5910 (jim_thompson5910):

(4-x)(5-3x) (4)(5)+(4)(-3x)+(-x)(5)+(-x)(-3x) 20-12x-5x+3x^2 20-17x+3x^2 3x^2-17x+20 So (4-x)(5-3x)=3x^2-17x+20

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