Verified answer

In rational algebraic exressions , the denominator should not be equal to zero.

We equate the denominator by zero:

• x²+5x-24=0
• (x+8)(x-3) = 0
• x+8 = 0 , x-3 = 0
• x = -8 , x = 3

• The values that are not permissable to the rational expression is -8 and 3