4(m+n)^2-9(m-n)^2

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4(m+n)^2-9(m-n)^24(m+n)^2-9(m-n)^24(m+n)^2-9(m-n)^2原式=[2(m+n)]^2-[3(m-n)]^2=(2m+2n+3m-3n)(2m+2n-3m+2

4(m+n)^2-9(m-n)^2
4(m+n)^2-9(m-n)^2

4(m+n)^2-9(m-n)^2
原式= [2(m+n)]^2-[3(m-n)]^2
=(2m+2n+3m-3n)(2m+2n-3m+2n)
=(5m-n)(4n-m)

原式=(2m+2n+3m-3n)(2m+2n-3m+3n)
=(5m-n)(5n-m)
望采纳

(4m 4n-1)(m n-2)