(3m-2n)²+24mn

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(3m-2n)²+24mn

(3m-2n)²+24mn
(3m-2n)²+24mn

(3m-2n)²+24mn
(3m--2n)^2+24mn=9m^2--12mn+4n^2+24mn
=9m^2+12mn+4n^2
=(3m+2n)^2.

(3m-2n)²+24mn=(3m+2n)²