2x²+1=3x2x²+1-3x=0x²-3/2x+(3/4)^2-(3/4)^2+1/2=0(x-3/4)^2=1/16x-3/4=1/4或x-3/4=-1/4x=1或x=1/2
2x²+1=3x2x^2-3x=-1x^2-(3/2)x=-1/2x^2-(3/2)x+9/16=1/16(x-3/4)^2=1/16x-3/4=1/4或-1/4所以x=1或x=1/2
