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oh, do you know what a fraction is equal to zero?
**when a fraction is equal to zero
Are you asking me if I know what happens or do you want to know the variable that would make the denominator 0?
if we consider a fraction as telling us how many we have, out of how many there are total ...
0 out of anything would equate to having none of it.
if we cut a pizza into 6 slices, and we get no slices ... we have 0 out of 6 slices.
in order for a fraction to equal zero, it is required that the top must equal zero ...
or, just mathing it. multiply both sides by the denominator ...
the left side cancels out the bottom, and the right side is just a multiplication of 0
So I need to figure out what x value makes the numerator 0?
then that should be the value of x that makes the left side equate to 0
as long as it does not zero out the bottom ... or possibly make the sqrt a negative arguement ...