计算4m2-5m(-m+2n-1)+4m(-2m-3n+2),其中m=2,n=-1
问题描述:
计算4m2-5m(-m+2n-1)+4m(-2m-3n+2),其中m=2,n=-1
答
带入得:4x4-10x(-2-2-1)+8x(-4+3+2)=16-10x(-5)+8x1=16+50+8=74
计算4m2-5m(-m+2n-1)+4m(-2m-3n+2),其中m=2,n=-1
带入得:4x4-10x(-2-2-1)+8x(-4+3+2)=16-10x(-5)+8x1=16+50+8=74