(6a+2b)^2=? if the formula is (a+b)^2=a^2+2ab+b^2
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(6a+2b)^2 [a^2+2ab+2b^2]
6a^2 + 2×6a+2b + 2b^2
36a^2 +24ab + 4b^2
6a^2 + 2×6a+2b + 2b^2
36a^2 +24ab + 4b^2
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