0 = -n^2 - 2n + 15 Oblicz n !!!!!!!!!!!!!!!!!!!!
-n^2 - 2n + 15 = 0 I*(-1)
n^2 + 2n - 15 = 0
a = 1, b = 2, c = -15
Δ = b²-4ac
Δ = 2^2 - 4*15 = 64
√Δ = 8
n1 = (-b-√Δ)/2a = (-2-8)/2 = -10/2 = -5
n2 = (-b+√Δ)/2a = (-2+8)/2 = 6/2 = 3
Odp. n = -5 v n = 3
rozwiazanie w zalaczniku
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-n^2 - 2n + 15 = 0 I*(-1)
n^2 + 2n - 15 = 0
a = 1, b = 2, c = -15
Δ = b²-4ac
Δ = 2^2 - 4*15 = 64
√Δ = 8
n1 = (-b-√Δ)/2a = (-2-8)/2 = -10/2 = -5
n2 = (-b+√Δ)/2a = (-2+8)/2 = 6/2 = 3
Odp. n = -5 v n = 3
rozwiazanie w zalaczniku