Question

The function of g += t^2-t represents the total number of games played by t teams in a sports league in which each team plays each of the other teams twice. The Metro League plays a total of 132 games. How many teams are in the league?
t^2-t = 132 ?

t^2 - t - 132 = 0

(t-12)(t+11) = 0

t = 12

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