(3m+2n)^2-(2m+3n)^2

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(3m+2n)^2-(2m+3n)^2(3m+2n)^2-(2m+3n)^2(3m+2n)^2-(2m+3n)^2(3m+2n)^2-(2m+3n)^2=[(3m+2n)+(2m+3n)]×[(3m+

(3m+2n)^2-(2m+3n)^2
(3m+2n)^2-(2m+3n)^2

(3m+2n)^2-(2m+3n)^2
(3m+2n)^2-(2m+3n)^2
=[(3m+2n)+(2m+3n)]×[(3m+2n)-(2m+3n)]
=(5m+5n)×(m-n)
=5×(m+n)(m-n)
=5m^2-5n^2

小鬼,你就不能自己主观能动的去想吗?