(csc x - 1) (csc x + 1)

Here we have the following expression:

So we need to extend this. Remember that the difference of squares tells us:

So here:

Thus:

y = - 6

step-by-step explanation:

given the point (- 2, y) lies on the graph then it is a solution of it's equation.

substitute x = - 2 into the equation for value of y

y = 3(- 2) = 3 × - 2 = - 6

the point on the graph is (- 2, 6)