(x-根号3)^2=4x+12-4根号3
(x-根号3)^2=4(x-根号3)+12
设X=(x-根号3)
所以
X^2=4X+12
X^2-4X-12=0
(X-6)(X+2)=0
X=6或负2
所以
x-根号3=6,即x=6+根号3
或
x-根号3=-2,即x=负2+根号3