(3x²-2x-1)÷(x-1)=(
问题描述:
(3x²-2x-1)÷(x-1)=(
答
x≠1时
(3x²-2x-1)÷(x-1)
=(3x+1)(x-1)÷(x-1) 第一步因式分解,3x²-2x-1分解成(3x+1)(x-1)
=3x+1
x=1时,分母为0,无意义