(-4a^3+12a^3b^3)(-4a^2)
问题描述:
(-4a^3+12a^3b^3)(-4a^2)
答
(-4a^3+12a^3b^3)(-4a^2)
=-4a^3×(-4a^2)+12a^3b^3 ×(-4a^2)
=16a^5-48a^5b^3