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Szkic i znaki w zalaczniku.
-x^2 + 4x - 2 < - 14
-x^2 + 4x - 2 + 14 < 0
-x^2 + 4x + 12 < 0 /*(-1)
x^2 - 4x - 12 > 0
Δ = 16 - 4 * 1 * (-12) = 16 + 48 = 64
√Δ = 8
x1 = (4 - 8)/2 = -4/2 = -2
x2 = (4 + 8)/2 = 12/2 = 6
++ +++++ a = 1 > 0
----o----------o--------->
-2 ------ 6
odp. x nalezy (-oo, -2) u (6, +oo)