3x^2-4x-2=0

3x^2-4x=2

x^2-4x/3=2/3

x^2-4x/3+4/9=2/3+4/9

(x-2/3)^2= 10/9

x-2/3= √ 10/3

x=(2-√ 10)/3，x=(2+√ 10)/3

Edited on 2011-05-16.

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Solving Equations in Senior High School Mathematics _ Learning Methods of Multiple-choice Questions in Senior High School Chinese

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