2x²﹢x-2-0 x²-4x+2=0 2x²﹢x-2-0x²-4x+2=02x²﹢x-2=0x²-4x+2=0改正下

问题描述:

2x²﹢x-2-0 x²-4x+2=0
2x²﹢x-2-0
x²-4x+2=0
2x²﹢x-2=0
x²-4x+2=0
改正下