Using the quadratic formula to solve x^2+20=2x, what are the values of x?

Marya wants to factor the polynomial 36x^3 -22x^2 - 144x.which term can she add to the polynomial that would not change its grestest common factor? check all that apply

What is the quotient of m^6/5 ÷ 5/m^2? assume m does not equal pl

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.