Question

please answer this question
$\sqrt{45 } - 3 \sqrt{20} + 4 \sqrt{5}$

Answer 1

Hey friend, ☺ here is ur answer ____________________________
plz see this attachment.
hope this helps you....

Answer 2

$\sqrt{45} - 3 \sqrt{20} + 4 \sqrt{5} \\ \\ \sqrt{3 \times 3 \times 5} - 3 \sqrt{2 \times 2 \times 5} + 4 \sqrt{5} \\ \\ 3 \sqrt{5} - (3 \times 2) \sqrt{5} + 4 \sqrt{5} \\ \\ 3 \sqrt{5} - 6 \sqrt{5} + 4 \sqrt{5} \\ \\ 7 \sqrt{5} - 6 \sqrt{5} \\ \\ \sqrt{5}$


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