3x^2+4x+1=0a=3,b=4,c=1b²-4ac=16-12=4x=(-4±√4)/6=(-2±1)/3x1=-1/3,x2=-13x^2+4x+1=0x²+4/3x+1/3=0x²+4/3x+4/9=1/9(x+2/3)²=1/9x+2/3=±1/3x1=-1/3,x2=-1