An auditorium has 80 rows of seats and the number of seats per row increases at a constant rate if there are 32 seats in the 8th row and 68 seats in the 20th row how many seats are in the last row

hello from mrbilldoesmath!

answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

you,

mrb

3000000000000000000000

the answer would be c