the normal to the curve y=x*3+6x*2-34x+44 at the point P(2,8) cuts the x axis at A and the y axis at B. show that the mid point of the line AB lies on the line 4y=x+9.​

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.