Please help I don’t know how to do this

What is the measure of ac? 5 units 13 units 26 units 39 units

The graph of a function f(x)=(x+2)(x-4). which describes all of the values for which the graph is negative and increasing? all real values of x where x< -2 all real values of x where -2

If u good at math hit me up on insta or sum @basic_jaiden or @ and