Let f(x)=0, you'll get x=3 and x=-5, those are the x-intercepts of the function.
I think it should also be 16 but I’m not pretty sure so hopefully you get it right !
Answer:D. x=10
Step-by-step explanation:
We are asked to determine the area of the given figure. To do that we will divide the figure into a square and a triangle. The area of the square is the product of its dimension, therefore, the area is:

The area of the triangle is given by the following formula:

Where "b" is the base and "h" is its height. Replacing the values:

The total area is the sum of both areas:

replacing the areas: