(3m+2n)^2-(m-n)^2
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(3m+2n)^2-(m-n)^2(3m+2n)^2-(m-n)^2(3m+2n)^2-(m-n)^2平方差=[(3m+2n)+(m-n)][(3m+2n)-(m-n)]=(4m+n)(2m+3n)a
(3m+2n)^2-(m-n)^2
(3m+2n)^2-(m-n)^2
(3m+2n)^2-(m-n)^2
平方差
=[(3m+2n)+(m-n)][(3m+2n)-(m-n)]
=(4m+n)(2m+3n)
a^2-b^2=(a+b)(a-b)
所以原式=(3m+2n+m-n)*(3m+2n-(m-n))
=(4m+n)(2m+3n)
同意上方答案
(1),(-m-n)(-m+n) (2),(-m+n)(m-n)
[(m-n)^2*(m-n)^3]^2/(m-n)^4
[(m-n)^2*(m-n)^3]^2/(m-n)^4
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(n-m)^3×(m-n)^2-(m-n)^5
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2m-3n-m+2n
(m-n)3-(2n-m)3
(3m-n)(m-2n)=()
(m+2n)(m-3n)
(m-3n)(2m+n)
约分(m-n)^2/(n-m)^3