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huyenlovesmytam
2 năm trước
Bài 10: Tìm các số nguyên x thoả mãn a) (x+5)(3-x)=0 b) (x² +1)( 9 - x² ) > 0 c) (x² -5)( x² - 36) <0 Bài 11: Cho 3 số nguyên a, b, c thoả mãn điều kiện |a| = b²(b – c). Trong đó có 1 số nguyên dương, một số nguyên âm và một số bằng 0. Hỏi số nào là số nguyên dương, số nào là số nguyên âm, số nào bằng 0
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