X2DO KWADRATU+1,5X-1=0
x²+1,5x-1=0
Δ= b²-4ac = 2,25+4 = 6,25
√Δ=2,5
x1= (-b-√Δ)/2a = (-1,5-2,5)/2 = -2
x2=(-b+√Δ)/2a = (-1,5+2,5)/2 = 1/2
x²+1,5x-1 = 0 I*10
10x²+15x-10 = 0
Δ = b²-4ac = 225+400 = 625
√Δ = 25
x1 = (-b-√Δ)/2a = (-15-25)/20 = -2
x2 = (-b+√Δ)/2a = (-15+25)/20 = 1/2
Odp. x = -2 v x = 1/2
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x²+1,5x-1=0
Δ= b²-4ac = 2,25+4 = 6,25
√Δ=2,5
x1= (-b-√Δ)/2a = (-1,5-2,5)/2 = -2
x2=(-b+√Δ)/2a = (-1,5+2,5)/2 = 1/2
x²+1,5x-1 = 0 I*10
10x²+15x-10 = 0
Δ = b²-4ac = 225+400 = 625
√Δ = 25
x1 = (-b-√Δ)/2a = (-15-25)/20 = -2
x2 = (-b+√Δ)/2a = (-15+25)/20 = 1/2
Odp. x = -2 v x = 1/2