Can you please help me. I only found 2 shapes.

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

Josephine has a great garden with and area of 2x2 + x - 6 square feet

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.