Question

How do you combine `(4n-3n^3)-(3n^3+4n)`?

Answer 1

Re-group and combine terms with variables to the same exponents

`(4color(red)(n) - 3color(blue)(n^3)) - (3color(blue)(n^3)+4color(red)(n))`

`=4color(red)(n) - 3color(blue)(n^3) - 3color(blue)(n^3)-4color(red)(n)`

`= (4n-4n) - (3n^3+3n^3)`

`=-6n^3`