计算(2m-3n)(4m^2+6mn+9n^2)
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计算(2m-3n)(4m^2+6mn+9n^2)计算(2m-3n)(4m^2+6mn+9n^2)计算(2m-3n)(4m^2+6mn+9n^2)=(2m)^3-(3n)^3(2m-3n)(4m^2+6
计算(2m-3n)(4m^2+6mn+9n^2)
计算(2m-3n)(4m^2+6mn+9n^2)
计算(2m-3n)(4m^2+6mn+9n^2)
=(2m)^3-(3n)^3
(2m-3n)(4m^2+6mn+9n^2)=(2m-3n)(2m+3n)^2
=(2m+3n)(2m+3n)(2m-3n)
=(2m+3n)(4m^2-9n^2)
=8m^3+12nm^2-18mn^2-27n^3
计算(2m-3n)(4m^2+6mn+9n^2)
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