Answer:
Because 4 is a perfect square
Step-by-step explanation:
When simplifying a radical, you have to look for perfect squares. 4 is a perfect square but x is not. Variables are only perfect squares if they have even numbered exponents so the x has to stay in the radical.
They are x = 8 and x = -4
The measure of a major arc would be more than 180 degrees
so the answer would be 196 degrees
