Question

How do you simplify `12x^3 + -18x^3`?

Answer 1

`-6x^3`

Explanation:

Simplify `12x^3+ - 18x^3`
as `12x^3-18x^3`

For any value of`" elephants"`
`color(white)("XXX")12" elephants" - 18" elephants" = -6" elephants"`

Assigning the value of `x^3` to `" elephants"`
we have
`color(white)("XXX")12x^3 - 18x^3 = -6x^3`