1) x = -3 or x = 1
2) x = -2
3) x = 9 or x = 1
4) x = -2 or x = 5
5) No solution
6) No solution
7) No solution
8) -1 ± Ö (19) / 3
9) x = ± 5
10) x = -5 ± Ö (89) / 16
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