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26-10-2016
Mathematics

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(5k-5)(4k-5) foil and distributive

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Zinethar Zinethar

07-01-2017

(a+b)(c+d)=ab+ad+bc+bd
(5k-4)(4k-5)=20k^2+-25k-16k+20=20k^2-41k+20

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