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y²-3y-180=0
Δ=b²-4ac=9+720=729
√Δ=27
y₁=(-b-√Δ):2a=(3-27):2=-12
y₂=(-b+√Δ):2a=(3+27):2=15
y² - 3y - 180 = 0
Δ = 9 -4*(-180) = 9 + 720 = 729
√Δ = 27
y1 = [3 - 27]/2 = -24/2 = -12
y2 = [3 + 27]/2 = 30/2 = 15
Odp. -12, 15
y²-3y-180=0
Δ=b²-4ac=(-3)²-4*1*(-180)=9+720=729
√Δ=√729=27
x₁=-b-√Δ/2a=3-27/2=-24/2=-12
x₂=-b+√Δ/2a=3+27/2=30/2=15