Binomial Theorem

[Rethabile Milisi]

find the first four terms using the binomial theorem:
1/(sqrt(x^2 - (3/y))
when attempting to solve I multiplied the denominator with 1/2
then took the binomial term raised to 1/2 to the numerator where I ended up with a negative exponent (-1/2)
then wrote the binomial theorem formula and inputted all values in my calculator and got a math error and I got stuck

 

[Steven G]

Can you please state the binomial theorem?

 

[Rethabile Milisi]

A method used to expand any binomial by the help of denoting the combination c(n,r)

 

[Steven G]

A method used to expand any binomial by the help of denoting the combination c(n,r)

That is not the definition of the binomial theorem.