Does any one want to play gta ps4 only

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

What rotation was applied to triangle def to create d’e’f’?