Решите пожалуйста квадратное неравенство!!!
а)
[tex]9 {x}^{2} \leqslant - 25 - 30x[/tex]
б)
[tex] - {x}^{2} > 16[/tex]
в)
[tex]3 {x}^{2} - x < 0[/tex]
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