.4(m+n)^2*(m+n)^3-7(m+n)(m+n)^4+5(m+n)^5=
2个回答
原式=4(m+n)^(2+3)-7(m+n)^(1+4)+5(m+n)^5
=4(m+n)^5-7(m+n)^5+5(m+n)^5
=(4-7+5)(m+n)^5
=2(m+n)^5
相关问题
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