4x²-7x-3-( )=2x²-3x+8

问题描述:

4x²-7x-3-( )=2x²-3x+8
括号里填什么?

4x²-7x-3-( )=2x²-3x+8
移项:4x²-7x-3-(2x²-3x+8 )=( )
∴()=4x²-7x-3-2x²+3x-8 =2x²-4x-11