Question

For what value of x is the rational expression below undefined?

Answer 1

C. -3

Explanation:

Since division by zero is undefined, the denominator of a fraction cannot equal zero.

To find the value of x that makes the expression undefined, set the denominator equal to zero and solve for x.

The denominator is 3 + x.

Set 3 + x equal to zero and solve for x.

3 + x = 0

Subtract 3 from both sides.

x = -3

The expression is undefined for x = -3.