Question

For what value of x would the expression below be undefined 5x-18/x-7

Answer 1

D. 7

Explanation:

The given expression is

`(5x-18)/(x-7)`

This is a rational expression.

This expression undefined, when the denominator is zero.

We equate the denominator to zero to get;

`x-7=0`

This implies that;

x=7

Answer 2

The correct answer option is 7.

Explanation:

We are given the following expression and we are to determine whether which of the given options for the value of x would the expression become undefined:

`\frac { 5 x - 1 8 } { x - 7 }`

We know that the expression is undefined when the denominator equals zero. So to make the denominator zero, the value of x should be 7.