4x^2+2=5x4x^2-5x+2=0△=b^2-4ac=25-32<0所以方程无解。(根号2x-1)^2=根号2（3根号2x^2-3x)2x^2-(2根号2)x+1=6x^2-(3根号2)x2x^2-(2根号2)x+1-6x^2+(3根号2)x=04x^2-(根号2)x-1=0(x-根号2/2)(x+根号2/4)=0x1=(根号2)/2x2=(-根号2)/4
h6s
