5,877 views
42 votes
42 votes
What is the least common denominator of the rationalexpressions below?

What is the least common denominator of the rationalexpressions below?-example-1
User Sherms
by
2.6k points

1 Answer

16 votes
16 votes

To find:

The least common denominator

Solution:

First factorise the denominators of both the fractions and find the common factors along with the uncommon factors.


x^2-7x=x(x-7)
x^2-4x-21=(x-7)(x+3)

So, the least common denominator is:


x(x-7)(x+3)

Thus, option A is correct.

User Larsiusprime
by
2.7k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.