3x²-6x+4=0, 2x²+1=3x, y²-4√3 y+12=0, (x-3)(2x+1)=-5, 2(x+1)²-4(x+1)²+2=0,

问题描述:

3x²-6x+4=0, 2x²+1=3x, y²-4√3 y+12=0, (x-3)(2x+1)=-5, 2(x+1)²-4(x+1)²+2=0,
过程加答案,谢谢.

3x²-6x+4=0
△=6²-4×3×4=-12