What is the value of x?

(Hint: Vertical Angles. Set the expressions equal to each other!)

Factorize: x^2+8x+10 i just solved it but i don't know if the process is correct

Aperpendicular bisector, cd is drawn through point con ab if the coordinates of point a are (-3, 2) and the coordinates of point b are (7,6), the x-intercept of cd is point lies on cd.

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.