2x^2-4√2x+3=0
x^2-2√2x+3/2=0
x^2-2√2x+2-2+3/2=0
(x-√2)^2-1/2=0
(x-√2-√2/2)(x-√2+√2/2)=0
(x-3√2/2)(x-√2/2)=0
x=3√2/2或x=√2/2
x^2-3x=-1
x^2-3x+1=0
x^2-3x9/4-9/4+1=0
(x-3/2)^2-5/4=0
(x-3/2-√5/2)(x-3/2+√5/2)=0
x=3/2+√5/2或x=3/2-√5/2