I need help fast please

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area

In which form is the following function written? y = - 2(x – 3)(x + 5)

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.