7x2+19x-6>0 (через дискриминант,с решением)
7x2+19x-6=0
D = 361+168 = 529
x1 = (-19 + 23) / 14 = 4/14
x2 = (-19 -23) / 14 = 3
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7x2+19x-6=0
D = 361+168 = 529
x1 = (-19 + 23) / 14 = 4/14
x2 = (-19 -23) / 14 = 3