Question 12
SurdsSimplify: 2√7 − 14/√7 + 7/√21
- A.√21/21
- B.7√21/3
- C.√21/3
- D.3√21
Show the answer and explanation
Answer: C (√21/3)
Explanation
14/√7 = 2√7, which cancels with 2√7. And 7/√21 = 7√21/21 = √21/3.
Simplify: 2√7 − 14/√7 + 7/√21
Answer: C (√21/3)
14/√7 = 2√7, which cancels with 2√7. And 7/√21 = 7√21/21 = √21/3.