mathas1 mathas1

07-02-2017
Mathematics

contestada

expand (2b +7) squared + (2b-7) squared

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catrionac catrionac

07-02-2017

(2b+7)^2+(2b-7)^2
4b^2+28b+49+4b^2-28b+49
8b^2+98

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