Question 2
SurdsLet a = √5 + √3. Find the value of a2 − 2√15
- A.8
- B.16
- C.10
- D.12
Show the answer and explanation
Answer: A (8)
Explanation
a² = 5 + 2√15 + 3 = 8 + 2√15, so a² − 2√15 = 8.
Let a = √5 + √3. Find the value of a2 − 2√15
Answer: A (8)
a² = 5 + 2√15 + 3 = 8 + 2√15, so a² − 2√15 = 8.