Question

Find the nonpermissible replacement for a in

this expression.
a + 6
a-8
Enter the correct answer.

Answer 1

8

Explanation:

Assuming the given expresion is:

`(a + 6)/(a - 8)`

Then we have a rational expression with domain a≠8

This means that we can replace 'a' with all real values except a=8.

We obtain this by setting the denominator equal zero and solve for 'a'.

The reason is that, the expression is not defined when the denominator is zero.

Therefore the non-permisible replacement is 8