Question 129719
(3x+1)(3x+1)(x-5)
First use the foil method
(3x*3x)+(3x*1)+(1*3x)+(1*1)
9x^2+3x+3x+1
(9x^2+6x+1)(x-5)
use foil again
(9x^2*x)+(9x^2*-5)+(6x*x)+(6x*-5)+(1*x)+(1*-5)
9x^3-39x^2-29x-5
good luck!