(2x-1)²-3(2x-1)+4=0

问题描述:

(2x-1)²-3(2x-1)+4=0
0.2分之(X²+2x+6)=0.3分之(1-x+x²)

1.(2x-1)²-3(2x-1)+4=0
令t=2x-1,则:
t²-3t+4=0
Δ