Question

Rational expressions
(for what value of x is the rational expression below undefined)?
3x-12/9-x

Answer 1

a good way to look at this is what makes the bottom 0 in this case it is 9

Answer 2

9-x /=0
x=/ 9

Answer 3

at 9

Answer 4

An expression makes sense when the denom isn't 0
so 3x-12/9-x in here \[9-x \neq0\] so \[9\neq0\]

Answer 5

denominator can't be 0, so when x=9, the expression is undefined.

Answer 6

for what value of x is the rational expression below equal to zero

2-x
______

2+x