B. A pair of alternate exterior angles with measures of 130 and 50
Step-by-step explanation:
The Alternate Exterior Angle Theorem states that if a pair of lines are congruent, then the alternate exterior angles are congruent. Since the lines are parallel and the said angle measures are not, Situation B is impossible.
You have to use the quadratic formula to solve this. The zeros of this quadratic are 2 + sqrt2/2 and 2 - sqrt2/2, which in "real" numbers is 1.707 and .2928