(3m+2n)的2次方-(2m+3n)的2次方

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(3m+2n)的2次方-(2m+3n)的2次方(3m+2n)的2次方-(2m+3n)的2次方(3m+2n)的2次方-(2m+3n)的2次方(3m+2n)²-(2m+3n)²=[(3

(3m+2n)的2次方-(2m+3n)的2次方
(3m+2n)的2次方-(2m+3n)的2次方

(3m+2n)的2次方-(2m+3n)的2次方
(3m+2n)²-(2m+3n)²
=[(3m+2n)+(2m+3n)][(3m+2n)-(2m+3n)]
=(5m+5n)(m-n)
=5(m+n)(m-n)
=5(m²-n²)
=5m²-5n²
请点击下面的【选为满意回答】按钮.

(3m+2n)²-(2m+3n)²
=9m²+12mn+4n²-4m²-12mn-9n²
=5m²-5n²

5M^2-5N^2
也可以是5(M+N)(M-N)