Question

Choose the correct simplification of (2x3 + x2 − 4x) − (9x3 − 3x2).

Answer 1

First distribute (multiply) the negative 1 into each term on the right. So your equation will look like this
\[2x^{3}+x^{2}-4x-9x^{3}+3x^{2}\]
Then combine like terms (you can only combine terms that are of the same Degree (the exponents need to be equal), example, only combine x3 with other x3's :D post again if you're still stuck

Answer 2

−7x3 + 4x2 − 4x correct? :) i get it

Answer 3

yayyy \c:/