Do the action: √45+√180 = ?

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ക്രിയ ചെയ്യുക: √45+√180 എത്ര?

A5√9

B8√5

C5√8

D9√5

Answer:

$\sqrt{45}+\sqrt{180}$

$=\sqrt{9\times5} +\sqrt{9 \times 5 \times 4}$

$=3\sqrt5+3\times2\sqrt5$

$=3\sqrt5+6\sqrt5$

$=9\sqrt5$

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