Question

How do we express one-half of the difference of a number cubed and one?

Answer 1

1/2(x^3 - 1) or we could write it as (x^3 - 1) / 2.

Explanation:

A number cubed is x^3. Difference of this and 1 is x^3 - 1.

Finall we have 1/2 of this:

= 1/2(x^3 - 1) or we could write it as (x^3 - 1) / 2.

Answer 2

`(x^3-1)/(2)`

Explanation:

We must follow what the statement asks us, starting from the last thing and going forward from there.

A number cubed:
`x^3`

The difference of a number cubed and one:
`x^3-1`

And finally:

one-half of the difference of a number cubed and one, this would be one half of the expression we already found:

`(x^3-1)/(2)`