Which graph is defined by f(x) = |x2 − x − 2|?

Answer with explanation:

The given function is

  f(x)= | x² -x-2|

x²-x-2

=x²-2 x + x -2

= x (x -2)+1(x-2)

= (x+1)(x-2)

Modulus of any polynomial function will always yield positive value.

All the points lying on x axis, above x axis which is in between the parabola and on and inside the parabola are solution of the given equation.

a. is correct

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads