Решите неравенство двумя способами:

1)x^2-x-9<0                                               7)-x^2-12x-100≤
2)6x^2-7x+2>0                                          8)4x^2-4x+15≤
3)-x^2-2x+48<0                                         9)5x^2+3-8>0.
4)8x^2+10x-3≥
5)25x^2-10x+1≥)
6)49x^2-28x+4<0
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