(9x四次方-12x三次方+54x平方)除以3x平方
问题描述:
(9x四次方-12x三次方+54x平方)除以3x平方
答
(9x^4-12x^3+54x^2)÷3x^2
=3x^2(3x^2-4x+18)÷3x^2
=3x^2-4x+18