Даю 43 балла
Укажите неравенство, не являющееся квадратным
[tex] {x}^{2} + 2x \leqslant 0[/tex]
[tex]5 {x}^{2} - 2x + 7 < 0[/tex]
[tex]x ^{2} - {x}^{4} \geqslant 0[/tex]
[tex] {x}^{2} + 13x - 40 < 0[/tex]
[tex] {x}^{2} \leqslant 49[/tex]
И объясните
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