а=30; в=13; с=-1
д=в^2 - 4ac
д=13^2 - 4x30x(-1)=169+120=289
x1=-B+v289/2a
x1=-13+17/2х30=4/60=1/15
x2 = -B-vд/2а
х2=-13-17/2х30=-30/60=-0.5
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а=30; в=13; с=-1
д=в^2 - 4ac
д=13^2 - 4x30x(-1)=169+120=289
x1=-B+v289/2a
x1=-13+17/2х30=4/60=1/15
x2 = -B-vд/2а
х2=-13-17/2х30=-30/60=-0.5