Math tutorial for adding two rational expressions

The video tutorial covers the process of adding fractions with common denominators, emphasizing the importance of finding the least common denominator. It explains that multiplying denominators is a simple method but not always the most efficient. The tutorial highlights the use of factoring, particularly the difference of squares, to identify common denominators. It demonstrates combining fractions by applying the distributive property and concludes with a final answer, noting restrictions on variable values.

What is the first step when adding fractions with the same denominator?

• Add the numerators

• Multiply the numerators

• Divide the numerators

• Subtract the denominators

How can you find a common denominator when adding fractions?

• Divide the numerators

• Add the numerators

• Multiply the denominators

• Subtract the denominators

What is the least common denominator of 9 and 3?

• 27

• 3

• 9

• 18

What should you do if you have an opportunity to factor when finding the least common denominator?

• Multiply the terms

• Always look to factor

• Add the terms

• Ignore it

What is the result of combining the fractions 3/(X-3)(X+3) and (2X+6)/(X-3)(X+3)?

• 3X + 6

• 2X + 9

• X + 9

• 2X + 3