Помогите пожалуйста с алгеброй!!! плиз
Решите квадратные неравенства
1)3x2 - 4x + 1<0
2) - 9x2 - 7x + 16>0
3) -x2 + 15x - 14<0
4) 2x2 - 7x + 3>0
5)x2 + 6x + 9≤0
СРОЧНО!!!
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