I am going to go with the assumption that your equation is

. If there is only one solution, then the equation must be a perfect square. So square

to solve for the equation in the similar form that is given.

. So the variables match up perfectly in the equation, meaning that the value of m is 6, letter choice C.
Answer:
answer is 2.
Step-by-step explanation:
A, the answer is A, something to do with opposite angles being the same, so A because 127 + 127 = 254