Can I get some help with PROBLEMS INVOLVING QUADRATIC EQUATIONS?

Question

You are hired to arrange 120 seats and to divide the areangement into 3 sets such as left, center, and right seating in the AVR Theater. In each set, the number of seats in each row is 3 less than the number of rows. You are to find the number of rows and number of seats in each row.

? · Answer

40 = r(r-3)
r^2-3r-40 = 0
(r-8)(r+5) = 0
3 Sets with
8 Rows with 5 seats in each row.

Can I get some help with PROBLEMS INVOLVING QUADRATIC EQUATIONS?

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