G(x) = (1)/(√(2x + 3))

Differentiate using the definition of the derivative.

The answer should be: G′ (x) = (−1)/((2x + 3)^3/2)

When you plug it into f(x+h)-f(x)/h, I think you multiply by the conjugate but I'm not entirely sure... Can someone explain how to get the answer. Explanations of the steps used would be nice too