Question

Simplify

$9\sqrt{5} - 4 \sqrt{5} + \sqrt{125}$
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Answer 1

Answer:

$9\sqrt{5} - 4 \sqrt{5} + \sqrt{125}=10\sqrt{5}$

Step-by-step explanation:

$9\sqrt{5} - 4 \sqrt{5} + \sqrt{125}$

$=9\sqrt{5} - 4 \sqrt{5} + \sqrt{5\times 5\times 5}$

$=9\sqrt{5} - 4 \sqrt{5} +5 \sqrt{5}$

$=(9-4+5)\sqrt{5}\\=10\sqrt{5}$

Therefore,

$9\sqrt{5} - 4 \sqrt{5} + \sqrt{125}=10\sqrt{5}$

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Answer 2

Answer:

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