Question

Find the nonpermissible replacement for y in the expression y-3/y+3

Answer 1

The nonpermissible replacement of the variable y is -3

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
`(y-3)/(y+3)` has the denominator
`y+3.`

This denominator cannot be equal zero, thus,

`y+3\\eq 0,\\ \\y\\eq -3.`