The equations are strangely written
. . and I don't agree with their answer.
Divide  by : .
Quadratic Formula: .
Perhaps I made a miscalculations ?
here is the original task:
Team A and Team B play between themselves 4 games of football.
It's known that the probability that team A will win all 4 games is 0.0625 and the probability that all 4 games will end with a draw (2 out of 2 events) is 0.0016.
What's the probability that team B will win in single game?