Simplify the radical expression by rationalizing the denominator.
2/ sqaure root 42
To rationalize the denominator, we multiply both the numerator and denominator by the square root of 42:
2 / √42 * √42 / √42 = 2√42 / 42
Now simplify by dividing out the common factor of 2:
√42 / 21
Therefore, the simplified radical expression with the rationalized denominator is √42 / 21.