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OpenStudy (anonymous):
multiply (5a-2b)^2
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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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