Answer:
A.
two rays that share a common endpoint called the vertex
Step-by-step explanation:
In Euclidean geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.
It either x=5 or x=-2 not sure which on
The answer is 6(x^2 -1) I have provided a picture with my work and the answer