A ladder 52 feet long stands against a straight tree, so that the foot of the ladder is 20 feet from the foot of the tree. How many feet up
the tree does the ladder extend? Round your answer to the nearest
whole number. (Enter your answer without units.)

(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

$9.41

step-by-step explanation:

i suppose it should be (y=2x-5)

step-by-step explanation:

the absolute value function