Question

Choose the correct simplification of
(3x^3 + 2x^2 − 5x) − (8x^3 − 2x^2).

−5x^3 + 4x^2 − 5x

5x^3 + 2x^2 + 5x

−5x^3 − 4x^2

5x^3 + 2x^2

Answer 1

\[(3x^3 + 2x^2 - 5x) - (8x^3 - 2x^2) \implies 3x^2 + 2x^2 - 5x - 8x^3 + 2x^2\]Can you just combine like terms now?

Answer 2

would it be the second answer?

Answer 3

No. Here's a hint:
\[(3x^3 - 8x^3) + (2x^2 + 2x^2) - 5x\]Combine what's in the parentheses.

Answer 4

is it the last answer

Answer 5

No...

Answer 6

then idk

Answer 7

Here's an example of how to do this.
\[x^2 + 2x^2 + x - 3x + 5 \implies 3x^2 - 2x + 5\]Do you see how I got that?

Answer 8

okay yeah i do