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phuongbaomyanh
2 năm trước
Cần gấp ạ, giải toán bằng cách lập phương trình ( lớp 8) B1: Tìm hai số tự nhiên liên tiếp có tổng các bình phương của nó là 85. Bài 2: Số nhà của Nam là một số tự nhiên có hai chữ số. Nếu viết thêm số 5 vào bên trái số đó thì được một số kí hiệu là A. Nếu thêm chữ số 5 vào bên phải số đó ta được một số ký hiệu là B. Tìm số nhà của Nam, biết A-B= 153.
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