Question

5a-[a2-{2a(1-a+4a2)-3a(a2-5a-3)}]-8a what is answer

Answer 1

5a-[a²-{2a(1-a+4a²)-3a(a²-5a-3)}]-8a

=5a-[a²-{2a-2a²+8a³-3a³+15a²+9a}]-8a

=5a-[a²-2a+2a²-8a³+3a³-15a²-9a]-8a

=5a-[-9a²-11a-5a³]-8a

=5a+9a²+11a+5a³-8a

=8a+9a²+5a³

i guess this is it. not entirely sure its correct

Answer 2

5a-[a²-{2a(1-a+4a²)-3a(a²-5a-3)}]-8a

=5a-a²+{2a(1-a+4a²)-3a(a²-5a-3)}-8a

=5a-a²+2a-2a²+8a³+15a²+9a-8a

=8a+12a²+5a³