look at x^2 -2x-3=0
or (x-3)*(x+1)=0, roots=3 & -1
me ges yu tri tu sae yu wanna look at -3+a weer a>4
that meen x^2 -2x+n, weer n> 1
first, look at x^2-2x+1=0...(x-1)*(x-1)=0
if n=2, yu get b^2-4ac=-4 & roots=komplex variabels
if n=1.1, yu get b^2-4ac=-0.4 & roots=komplex variabels