1) Решите систему уравнений:
2х-3у=8
х+у=9
1) (7,2)
2) (2,7)
3) (4,5)
4) (5,4)
2) Решите уравнение:
(х-1)²=36-4х
1) 7
2) -7
3) -5
4) 5
3)√54-14√5  * (√5+7)
1) 44
2) 40
3) 25
4) 7
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