What is the third form gcf's come in the form of

Need ! give step by step solutions on how to solve number one [tex]\frac{9-2\sqrt{3} }{12+\sqrt{3} }[/tex] number two [tex]x+4=\sqrt{13x-20}[/tex] number three (domain and range) [tex]f(x)=2\sqrt[3]{x} +1[/tex]

An angle that measures between 90 and 180° is called a(,

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180