当a=2,b=1时,求多项式:3a^2-6a^2b-6-2ab^2+6a^2b-4a^3
问题描述:
当a=2,b=1时,求多项式:3a^2-6a^2b-6-2ab^2+6a^2b-4a^3
答
-102
答
3a^2-6a^2b-6-2ab^2+6a^2b-4a^3
=3a^2-6-2ab^2-4a^3
当a=2,b=1时,3a^2-6-2ab^2-4a^3=3×2²-6-2×2×1²-4×2³=-30