Question

$3\sqrt{5} +\sqrt{125} =?$

• A. 5√5
• B. 8√5
• C. 40
• D. 3√5+5

Answer 1

Answer:

B. 8√5

$3\sqrt{5} +\sqrt{125}$

$= 3\sqrt5 + \sqrt{(25 \times 5) }$

$=3\sqrt5 + 5\sqrt5$

$=8\sqrt5$