Q402
If (3 + 2√5)2 = 29 + K√5, then what is the value of K?
A.
12
AnswerB.
6
C.
29
D.
39
Answer: Option A
Solution
Answer: Option A
Solution:
(3 + 2√5)2 = 29 + K√5⇒ 9 + 20 + 12√5 = 29 + K√5
⇒ 29 + 12√5 = 29 + K√5
⇒ K√5 = 12√5
⇒ K = 12