Question

How do you find the sum of `6x^3, 9x^3` and `-4x^3`?

Answer 1

`11x^3`

Explanation:

`6x^3, 9x^3` and `-4x^3` are all multiples of `x^3`.

`6x^3=x^3*6`

`9x^3=x^3*9`

`-4x^3=x^3*-4`

total `= (6+9+ -4)*x^3`

`=11*x^3`

`=11x^3`