Beth and Jena worked the following problem on a math test. They both solved the problem incorrectly. Identify the mistake each person made and solve for the correct answer.

When you answer this can you explain

Sketch one cycle if the cosine function y=2cos2theta

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