Question

Given a rational expression, identify the excluded values by finding the zeroes of the denominator.

x − 4
x2 + 2x − 24
The excluded values are x ≠ .

Answer 1

Explanation:

In the rational fraction (x - 4)/(x² + 2x - 24),

x² + 2x - 24 is the denominator.

When x² + 2x - 24 = 0, (x + 6)(x - 4) = 0.

=> x = -6 or x = 4.

The excluded values for x are -6 and 4.