Д(f); x^2-x-6#0
D=1+24=25
x1,2=1+-5/2
x1=-2
x2=3
x#-2; x#3
2) x^2-4x+4=0
D=4-4=0
x=2+0/1=2
3) (x+2)(x-2)(x-3)<0
--------- -2 //////////// 2 //////////// 3-------->x
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Д(f); x^2-x-6#0
D=1+24=25
x1,2=1+-5/2
x1=-2
x2=3
x#-2; x#3
2) x^2-4x+4=0
D=4-4=0
x=2+0/1=2
3) (x+2)(x-2)(x-3)<0
--------- -2 //////////// 2 //////////// 3-------->x