Question

√45-3√20+4√5 simplify the following question

Answer 1

Answer:

√5

Step-by-step explanation:

√45-3√20+4√5

=> √9 x 5 - 3√4 x 5 + 4√5

=> 3√5 - 6√5 + 4√5

=> √5

ans :  √5

Hope this helps you

               :)

Answer 2

Step-by-step explanation:

$\bf \underline{Solution-}$

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

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

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

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

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