3x^2+5x-1=x^2-4x
3x^2-x^2+5x+4x-1=0
2x^2+9x-1=0
х(3х+5)-1=х(х-4)
3х^2+5х-1=х^2-4х
3х^2+5х-1-х^2+4х=0
2х^2+9х-1=0
3x^2+5x-1=x^2-4x
3x^2-x^2+5x+4x-1=0
2x^2+9x-1=0
х(3х+5)-1=х(х-4)
3х^2+5х-1=х^2-4х
3х^2+5х-1-х^2+4х=0
2х^2+9х-1=0