A) \[\sqrt{5}\]
B) 2
C) 4
D) \[3\sqrt{5}\]
Correct Answer: B
Solution :
\[\sqrt{(7+3\sqrt{5})(7-3\sqrt{5})=\sqrt{49-9\times 5}}\] \[=\sqrt{49-45}\] \[=\sqrt{4}=2\]You need to login to perform this action.
You will be redirected in
3 sec