Question

How do you evaluate `sqrt(x+7)` when x = 9?

Answer 1

`=color(blue)(4`

Explanation:

The expression is `sqrt(x+7)`, and the value for the variable `x` given is `9`.

Substituting the same:

`sqrt(x+7)= sqrt(color(blue)(9)+7`

`=sqrt16`

`=sqrt(2^2*2^2)`

`=color(blue)(4`