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vuthithuylinh15052001
2 năm trước
CHO PHƯƠNG TRÌNH ẨN XX : x ² -(m+2)x +m+1=0 a) chứng tỏ phương trình luôn có nghiệm với mọi m b) tìm m để ( x1 +x2) ² - 5x1x2 = -1 giup mik vs a mik dg can gap
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