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Mathematics 40 Online
OpenStudy (anonymous):

multiply (5a-2b)^2

OpenStudy (bahrom7893):

(5a-2b)^2 = 25a^2 - 20ab + 4b^2

OpenStudy (bahrom7893):

the rule is: (x-y)^2 = x^2 - 2xy + y^2, in this case: x = 5a y = 2b

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