How do you factor x squared minus 5a squared equals negative 4ax into a solution set?

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Which of the following expressions is equal to 2x^2+8

1) in triangle the, what is the measure of angle t (in degrees)? 2) in triangle bat, the measure of angle b is 66∘, and the measure of angle t is 77∘.what is the measure of the exterior angle at a (in degrees)?