376. Решите приведенное квадратное уравнение:
1) х2 + 4х - 5 = 0;
3) x2 - 8x - 9 = 0;
5) x2 + x - 6 = 0;
2) х2 - 6x - 7 = 0;
4) x2 + 6x - 40 = 0;
6) x2 - x - 2 = 0.​
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