posted by jessica .
(3x^2 - 2x - 1)(x^2 + x + 5)
= 3x^4 + 3x^3 + 15x^2 + -2x^3 - 2x^2 ..... etc
(you should have 9 terms in this line)
can you see what I am doing?
it is just an expanded version of the old FOIL concept
I am sure you can finish it
There will be all kinds of like terms, make sure to simplify.
compare your answer with