How do you multiply #(5a^3-9)(3a^2-1)#?

1 Answer
Barney V.
Apr 29, 2017

#color(blue)(15a^5-5a^3-27a^2+9#

Explanation:

#color(white)(aaaaaaaaaaaaa)##5a^3-9#
#color(white)(aaaaaaaaaaaaa)## underline(3a^2-1)#
#color(white)(aaaaaaaaaaaaa)##15a^5##color(white)(aaaaaaaaa)##27a^2#
#color(white)(aaaaaaaaaaaaaaaaaaa)##underline(-5a^3color(white)(aaaaaaaaaaa)##+9#
#color(white)(aaaaaaaaaaaaaa)##color(blue)(15a^5-5a^3-27a^2+9#

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