Question

−8a^2(a + 1) + 3a(a^2 − 8) − a^2(a + 5)
Simplify the Expression

I keep getting -6a^3+4a^2-24a but the website i do my homework on keeps saying it's wrong.

Answer 1

I think its -6a^3 - 13a^2 - 24a

Answer 2

because...

-8a^2 ( a + 1) + 3a (a^2 - 8) - a^2( a + 5)
= -8a^3 - 8a^2 + 3a^3 -24a - a^3 - 5a^2
= -6a^3 - 13a^2 -24a

Answer 3

Thank you, i guess my brain didn't do the 8 *1 is 8 part lol wow