[GMAT math practice question]
$$\frac{6}{\sqrt{5}}-\frac{\sqrt{5}}{5}=?$$
A. 1
B. -1
C. √5
D. -√5
E. 2√5
6/√5-√5/5=?
This topic has expert replies
- Max@Math Revolution
- Elite Legendary Member
- Posts: 3991
- Joined: Fri Jul 24, 2015 2:28 am
- Location: Las Vegas, USA
- Thanked: 19 times
- Followed by:37 members
Timer
00:00
Your Answer
A
B
C
D
E
Global Stats
Math Revolution
The World's Most "Complete" GMAT Math Course!
Score an excellent Q49-51 just like 70% of our students.
[Free] Full on-demand course (7 days) - 100 hours of video lessons, 490 lesson topics, and 2,000 questions.
[Course] Starting $79 for on-demand and $60 for tutoring per hour and $390 only for Live Online.
Email to : [email protected]
- Max@Math Revolution
- Elite Legendary Member
- Posts: 3991
- Joined: Fri Jul 24, 2015 2:28 am
- Location: Las Vegas, USA
- Thanked: 19 times
- Followed by:37 members
=>
$$\frac{6}{\sqrt{5}}-\frac{\sqrt{5}}{5}=\frac{6\sqrt{5}}{\sqrt{5}\sqrt{5}}-\frac{\sqrt{5}}{5}=\frac{6\sqrt{5}}{5}-\frac{\sqrt{5}}{5}=\frac{5\sqrt{5}}{5}=\sqrt{5}$$
Therefore, the answer is C.
Answer: C
$$\frac{6}{\sqrt{5}}-\frac{\sqrt{5}}{5}=\frac{6\sqrt{5}}{\sqrt{5}\sqrt{5}}-\frac{\sqrt{5}}{5}=\frac{6\sqrt{5}}{5}-\frac{\sqrt{5}}{5}=\frac{5\sqrt{5}}{5}=\sqrt{5}$$
Therefore, the answer is C.
Answer: C
Math Revolution
The World's Most "Complete" GMAT Math Course!
Score an excellent Q49-51 just like 70% of our students.
[Free] Full on-demand course (7 days) - 100 hours of video lessons, 490 lesson topics, and 2,000 questions.
[Course] Starting $79 for on-demand and $60 for tutoring per hour and $390 only for Live Online.
Email to : [email protected]