Question

simplify
root of 45 - 3 root of 20 +4 root of 5

Answer 1

HEY MATE YOUR ANSWER IS HERE ^_^

$\sqrt{45} - 3 \sqrt{20} + 4 \sqrt{5}$
$3 \sqrt{5} - 6 \sqrt{5} + 4 \sqrt{5}$
$7 \sqrt{5}$
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Answer 2

Step-by-step explanation:

$\bf \underline{Solution-}$

$\sf{ \sqrt{45} - 3 \sqrt{20} + 4 \sqrt{5} }$

$\sf{ = \sqrt{9 \times 5} - 3 \sqrt{4 \times 5} + 4 \sqrt{5} }$

$\sf{ = 3 \sqrt{5} - 3 \times 2 \sqrt{5} + 4 \sqrt{5} }$

$\sf{ = (3 - 6 + 4) \sqrt{5} }$

$\sf{ = \sqrt{5} } \: \: \: \: \bf{Ans.}$