(m的2次方-3m+2)-(4m-2n-1)
问题描述:
(m的2次方-3m+2)-(4m-2n-1)
答
m²-3m+2-4m+2n+1
=m²-7m+2n+3
(m的2次方-3m+2)-(4m-2n-1)
m²-3m+2-4m+2n+1
=m²-7m+2n+3