初二数题(1)5x(x^2-2x-4)+x^2(x-1)
问题描述:
初二数题(1)5x(x^2-2x-4)+x^2(x-1)
还有(2ax)^2•(-2\5a^4x^3y^3)\(-1\2a^5xy^2)
答
解
5x(x²-2x-4)+x²(x-1)
=5x³-10x²-20x+x³-x²
=6x³-11x²-20x你追问,我用电脑答