Question

Find the nonpermissible replacement for y in the expression s-5/s+7

Answer 1

The nonpermissible replacement of the variable s is -7

Explanation:

The nonpermissible replacement of the variable in a certain expression is the value of the variable that will make the denominator of the expression zero.

The expression
`(s-5)/(s+7)` has the denominator
`s+7.`

This denominator cannot be equal zero, thus,

`s+7\\eq 0,\\ \\s\\eq -7.`