(1):(y-3)^2=7=>y-3=根号7或-根号7=>x=3+根号7或3-根号7, (2):x^2-3x+1/2=0=>(x-3/2)^2=7/4=>x-3/2=根号7/2或-根号7/2=>x=3/2+根号7/2或3/2-根号7/2, (3):x^2-3x-6=0=>(x-3/2)^2=33/4=>x=3/2+根号33/2或3/2-根号33/2, (4):x^2-2根号3x+2=0=>(x-根号3)^2=1=>x=根号3+1或根号3-1
(1):(y-3)^2=7=>y-3=根号7或-根号7=>x=3+根号7或3-根号7, (2):x^2-3x+1/2=0=>(x-3/2)^2=7/4=>x-3/2=根号7/2或-根号7/2=>x=3/2+根号7/2或3/2-根号7/2, (3):x^2-3x-6=0=>(x-3/2)^2=33/4=>x=3/2+根号33/2或3/2-根号33/2, (4):x^2-2根号3x+2=0=>(x-根号3)^2=1=>x=根号3+1或根号3-1