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?