((sqrt x) - 2) / x - 4

I need to get it so I can put 4 in for x, and I can't right now because that would make the bottom zero. And I know there has to be a way to do it because it's in a section of problems where that is what I have to do for all of them.

And in case it isn't clear, the top is the square root of just x, minus two.

## Answers (1)

there is no problem putting x = 4 in denominator

unless you meant:

(sqrt(x) - 2) / (x - 4).

Otherwise, as you originally entered:

(sqrt(4) - 2) / 4 - 4

(2 - 2) / 4 - 4

0 / 4 - 4

0 - 4

-4

if you really did mean

(sqrt(x) - 2) / (x - 4)

then if x must = 4, the answer is "undefined."

At your level (I guess), that's acceptable because that's one of the things you're learning (but so is PEMDAS).

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Reference:sciencing.com/solve-math-problem-u...