   Chapter 1.1, Problem 68E
Textbook Problem

In Exercises 63-68, rationalize the denominator.68. 2 x y

To determine

To evaluate: The rational expression by rationalize the denominator.

Explanation

Given:

The rational expression is. 1x3 .

Definition1:

The rational expression is,

1a

The denominator of the rational expression is,

a

The conjugate of the denominator is,

a

Then rationalize the denominator is,

1a×aa=aa

Definition2:

Multiply the root square root number,

a×a=(a)2=a

Calculation:

Use definition 1 and definition 2 to evaluate the rational factor,

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