scheduling the games for softball league to find the no. of games he needs to schedule , he uses the equation 1/2n2-1/2n where a represents the number of games needed for each team exactly once and n represents the no. of teams. write the equation in factored form. how many games are needed for 7 teams to plan each other exactly 3 times

Question

anonymous · Answer

$$= \frac{1}{2n^2} - \frac{1}{2n} = \frac{(1- n)}{2n^2}$$

anonymous · Answer

it must be 
$$\frac{1}{2}n^2-\frac{1}{2}n$$ right?

anonymous · Answer

or even 
$$\frac{n(n-1)}{2}$$

anonymous · Answer

$$\frac{1}{2}n^2-\frac{1}{2}n = 9$$

anonymous · Answer

$$n^2 - n = 18$$

anonymous · Answer

something goofy with this question.
what does 
"where 9 represents the number of games needed for each team exactly once " mean?

flor · Answer

yes that is |dw:1341925300884:dw|