Given f(x)=x2+8x+13, what is this quadratic function in vertex form? f(x)=(x+8)2+13 f(x)=(x−8)2−13 f(x)=(x+4)2+29 f(x)=(x+4)2−3

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.