Question

The first step when adding or subtracting rational expression with unlike denominator is to

Answer 1

Answer ↓

• The first step when adding or subtracting rational expressions with unlike denominators is to multiply the denominators together.

Explanation ↓

Adding or subtracting rational expressions is remarkably similar to adding and subtracting fractions, since a rational expression is a fraction.

The operations are the same.

When adding or subtracting fractions with unlike denominators, we multiply the denominator of one fraction times the denominator of the other fraction, and then alter the numerators.

The process with rational expressions is the same.

So the first step is to make sure both rational expressions have the same denominator.

hope helpful ~

Answer 2

To add or subtract rational expressions with unlike denominators, first find the LCM of the denominator. The LCM of the denominators of fraction or rational expressions is also called least common denominator, or LCD. Write each expression using the LCD.