Question

Which represents all the values of x that make the rational expression undefined? x = –3 x = 7 x = –7 or x = 7 x = –3 or x = 3

Answer 1

Answer:

The value of x would be -3.

Step-by-step explanation:

Consider the complete question is,

'Which represents all the values of x that make the rational expression $\frac{-6x + 42}{3x + 9}$ undefined?'

Since, the rational expression is defined for all real values except those for which denominator is equal to zero,

If 3x + 9 = 0,

3x = -9

$\implies x =-\frac{9}{3}=-3$

Hence the values of x that make the rational expression undefined would be -3.