Answer
The logical first step in rationalizing the denominator is to multiply by the conjugate. In this way we eliminate the possibility to have a square root in the denominator.
CONJUGATE $$\frac{1-\sqrt x}{1-\sqrt x}$$
Work Step by Step
$\frac{3}{1+\sqrt x}$
The first logical step to rationalize the denominator is to multiply by the conjugate of the deniminator.
CONJUGATE ${1-\sqrt x}$
$$(\frac{3}{1+\sqrt x})(\frac{1-\sqrt x}{1-\sqrt x})$$ $$\frac{3-3\sqrt x}{1-x}$$ $$\frac{3(1-\sqrt x)}{1-x}$$
Cancel similar terms
Answer: 3
