Phạm Thị Mai
Giới thiệu về bản thân
Hi ｡ʕ•ᴥ•ʔ｡
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2022-05-03 21:51:05
Có: x2 - 3x + 2 = 0 => x2 - x - 2x + 2 = 0 => x.(x - 1) - 2.(x - 1) = 0 => (x - 1).(x - 2) = 0 => x - 1 = 0 => x = 1 hoặc x - 2 = 0 => x = 2
Vậy x = {1;2}
2022-04-04 18:36:00
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