2numbers greater than 19 that are divisible by 2, 3, 6 and 9

The graph of fx shown below has the same shape as the graph of gx = 3x^2 but is shifted down 2 units

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.