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kimhue14s20
2 năm trước
1)Tìm x,y thoả mãn: a) (2x+1)(y-2)=12 b) xy² + 2x -y² = 8 2) Cho nó là số tự nhiên biết: a) Tìm ƯCLN( 2n+9;n+4) b) Chứng tỏ 3n+7 và 2n+5 là 2 số nguyên tố cùng nhau. Giúp mình với 🙏🙏( nếu đc giải thích rõ ràng giúp mình nhé 💖💖)
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