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P1(x)/Q1(x) + P2(x)/Q2(x) + ... + Pm(x)/Qm(x) >(<) 0,
P1(x), ... , Pm(x), Q1(x), ... , Qm(x) - , .

ax2 + bx + c, a, b, cR, a ≠ 0.

, : a > 0, ax2 + bx + c > 0, x; a < 0, ax2 + bx + c < 0, x.


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