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ttmy2003
2 năm trước
bài 1. giải các pt sau: 1. x² - (2+ √3)x + 2√3 = 0 ; 2. x² - (1 + √2)x + √2 = 0 3. ( 1 + √2)x² - x - √2 = 0 ; 4. ( 1 - √2)x² - 2√2x + √3 = 0 Bài 2. . Tìm m để các phương trình sau có nghiệm 1)mx² - 2(m+1)x + m + 3 =0 2) (m-1)x² - 4(m+1)x + 4m+3=0 Bài 3. Tìm m để các phương trình sau vô nghiệm 1) 3x² - 2x + m =0 2) mx²- 4mx+ 4m - 1 = 0
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