2x²-8=3x

2x²-8=3x
2x²-8=3x

2x²-8=3x
2x²-8=3x
2x²-3x-8=0
x²-(3/2)x-4=0
x²-(3/2)x+9/16-9/16-4=0
[x-(3/4)]²=25/16
x=3/4±5/4
x1=2,x2=-1/2

用求根公式算

2x²-8=3x
2x²-3x-8=0
x²-(3/2)x-4=0
x²-(3/2)x+9/16-9/16-4=0
[x-(3/4)]²=73/16
x=3/4±根号(73/16)
x1=3/4+根号(73/16),x2=3/4-根号(73/16)