Which important information did you include in
your description? Check all of the boxes that
apply.
Check for a greatest common factor.
There are four terms, so consider factoring
by grouping, which yields
(2x +5)(x2 - 4).
Identify x2 - 4 as the difference of squares.
Factor complehely as
(2x + 5)(x + 2)(x - 2).

(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

the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.