(5x+2x-3-4x^3)-(-x+3x^3-x^2) 合并同类项
问题描述:
(5x+2x-3-4x^3)-(-x+3x^3-x^2) 合并同类项
答
(5x+2x-3-4x^3)-(-x+3x^3-x^2)
=5x+2x-3-4x^3+x-3x^3+x^2
=-7x^3+x^2+8x-3