2x²-8=3x
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2x²-8=3x2x²-8=3x2x²-8=3x2x²-8=3x2x²-3x-8=0x²-(3/2)x-4=0x²-(3/2)x+
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)