x²-3x+2=0 x²-3x+(3/2)²-(3/2)²+2=0 然后怎么算?
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x²-3x+2=0 x²-3x+(3/2)²-(3/2)²+2=0 然后怎么算?
x²-3x+2=0 x²-3x+(3/2)²-(3/2)²+2=0 然后怎么算?
x²-3x+2=0 x²-3x+(3/2)²-(3/2)²+2=0 然后怎么算?
(X-2/3)的平方=1/4
所以X-2/3= 1/2 或者X-2/3=-1/2
X=7/6,或X=1/6