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trinhtuyetdoan12345
2 năm trước
Một mảnh vườn hình chữ nhật chiều dài x(m) chiều rộng y(m) (x,y > 3) người ta mở một lối đi xung quanh vườn (thuộc đất của vườn) rộng 1,5m. a/ Hỏi chiều dài, chiều rộng của khu đất còn lại để trồng trọt là bao nhiêu(m)? b/ Tính diện tích khu đất còn lại để trồng trọt biết x = 18m; y = 13m.
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