Answer:
ADB=50°
Step-by-step explanation:
Angles subtended by the same segment are equal
Step-by-step explanation:
This isn't. a true identity.

If you are looking for x then it is X = 18
To factor, you split the equation so the factors multiply to get the whole equation.
(x-2)(x+2)
Then, interpret the factors.
The zeros can be found at (2,0) and (-2,0).
x=2, x=-2