1、x²=√3+2x²=(4+2√3)/2x=(√6+√2)/2 x=-(√6+√2)/22、x²-x=5/4x²-x+1/4=6/4(x-1/2)²=6/4x=1/2+√6/2 x=1/2-√6/23、-3x²+7x-2=03x²-7x+2=0(3x-1)(x-2)=0∴x=1/3 x=2...