Chủ đề:
Violympic toán 8Câu hỏi:
If x+3 is a factor of both 2x^2-x+m and 3x^2-2x+6,then the value of m+n is
A man expected to travel from A to B at 40 kilometers per hour. However, when he had gotten a half of his route, he sped up and travelled at an average speed of 60 kilometers per hour. Therefore, he reached B 1 hour earlier than his plan. How long is AB in kilometers?