{x+2y=3, 1){x^2-2y^2+3x-2=0 2)由1),得y=(3-x)/2代入2),得x^2-2[(3-x)/2]^2+3x-2=02x^2-(3-x)^2+6x-4=0x^2+12x-13=0(x+13)(x-1)=0x1=-13,x2=1y1=8,y2=1