Hi! I am working on finding limits using factoring, using a khan academy course. I am EXTREMELY confused, because they seem to magically erase numbers, and I do not know how they do so mathematically. In the below equation, I have no idea why they are able to remove the 1^2 that is in the denominator. How does this happen?

Here is the equation given:

((x-2) X (1 + sqrt(3x-5))) / **1^2 **- (3x-5)

And it becomes:

((x-2) X (1 + sqrt(3x-5))) / -3(x-2)

To be reduced to:

(1 + sqrt(3x-5)) / -3

How are we able to simply get rid of the 1^2?

WillyGolden Dec 16, 2020