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6/√5-√5/5=?

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by Max@Math Revolution » Thu May 23, 2019 12:22 am

Timer

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Answers

A

B

C

D

E

Stats

Difficulty—

[GMAT math practice question]

$$\frac{6}{\sqrt{5}}-\frac{\sqrt{5}}{5}=?$$

A. 1
B. -1
C. √5
D. -√5
E. 2√5
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by Max@Math Revolution » Sun May 26, 2019 5:32 pm
=>

$$\frac{6}{\sqrt{5}}-\frac{\sqrt{5}}{5}=\frac{6\sqrt{5}}{\sqrt{5}\sqrt{5}}-\frac{\sqrt{5}}{5}=\frac{6\sqrt{5}}{5}-\frac{\sqrt{5}}{5}=\frac{5\sqrt{5}}{5}=\sqrt{5}$$

Therefore, the answer is C.
Answer: C
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