Question

What's the algebraic expression of "4 times a number cubed decreased by 7"?

Answer 1

Take the variable to be x

4x^3-7

Answer 2

Statement: "4 times a number cubed decreased by 7"

Let a number be x is denoted as an arbitrary variable.

Now, cubed means raise x to the third power i.e
`x^3`

then, 4 times a number cubed i.e
`4x^3`

Decreased by 7 means, subtract 7

⇒
`4x^3-7`

Therefore, the algebraic expression for the given statement is,
`4x^3-7`