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1. $\sqrt{180} a n d \sqrt{80}$

A. $2 \sqrt{5}$
B. $2 \sqrt{5}$
C. $2 \sqrt{5}$
D. $2 \sqrt{5}$

Answer: Option A

Explanation:

√180 - √80

= 6√5 - 4√5

= 2√5

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