已知2m=2,2n=3求二倍的2m减3n加2=多少

2025-01-07 09:45:24
推荐回答(2个)
回答1:

2(2m-3n+2)是吗
=2×2m-2×3n+4 (2×3n=3×2n)
=2×2-3×3+4=-1

回答2:

2×2m-3n+2
2×2-3×(3/2)+2
=4-4.5+2
=1.5