解:X²-X+6=0
(x-0.5)²+5.75=0
x无解
应该是X²-X-6=0吧
X²+(2-3)X+(-3×2)=0
(x+2)(x-3)=0
x=-2或x=3
x^2-x+6=0
X^2-2*1/2x+1/4+23/4=0
(x-1/2)^2+(23开根号/2)=0
x=1/2+23开根号/2*i 或 x=1/2-23开根号/2*i
(x-1/2)2-1/4+6=0
(x-1/2)2=-23/6
无解
x^2-x+6=(x^2-x+1/4)-1/4+6=(x-1/2)^2+23/4=0
(x-1/2)^2=-23/4
无解