At 7:00am Two groups for hikers begin 21 miles apart and head toward each other the first group hiking at an average rate of 1.5 miles per hour carries tent sleeping bags and cooking equipment the second group hiking at an average rate of 2 miles per hours carries food and water let T represent hiking time use D=RT formula
At what time will both groups meet?

yo i know this may seem wierd but i don't like solving math on here it tak long sry

Step-by-step explanation:

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18

x = 3 ± √(5+y)