Question

Find the nonpermissible replacement for y in this expression y-7/y+9

Answer 1

y ≠ - 9

Explanation:

the denominator of the expression cannot equal zero as this would make the expression undefined. Equating the denominator to zero and solving gives the value that y cannot be

solve y + 9 = 0 ⇒ y = - 9 ← not permissable