Question

How do you evaluate the expression `n^2` when n=7 and when n= 0.4?

Answer 1

See a solution process below:

Explanation:

To evaluate this expression for when `n = 7` we need to substitute `color(red)(7)` for `color(red)(x)` in the expression:

`color(red)(n)^2` becomes:

`color(red)(7)^2 => 7 * 7 => 49`

To evaluate this expression for when `n = 0.4` we need to substitute `color(red)(0.4)` for `color(red)(x)` in the expression:

`color(red)(n)^2` becomes:

`(color(red)(0.4))^2 => 0.4 * 0.4 => 0.16`