Question

simplyfy √45-2√20 + 4√5​

Answer 1

Answer:

6.708203932 is the answer of this question.

Answer 2

Step-by-step explanation:

$\sqrt{45} - 2 \sqrt{20} + 4 \sqrt{5}$

$= \sqrt{9 \times 5} - 2 \sqrt{4 \times 5} + 4 \sqrt{5}$

$= 3 \sqrt{5} - 4 \sqrt{5} + 4 \sqrt{5}$

$= 3 \sqrt{5}$

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