4M^3乘N^2-4M^2乘N+M
问题描述:
4M^3乘N^2-4M^2乘N+M
答
4m³n²-4m²n +m
=m(4m²n²-4mn+1)
=m[(2mn) ²-2•2mn•1+1²]
=m(2mn-1) ²