How do you simplify $sqrt5 - sqrt 45$ ?

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Answer 1 · 2016-05-22T20:03:52

$-2.sqrt5$

$sqrt5 - sqrt45$

We have, $sqrt45$ = $3. sqrt5$
as $45= 3^2 .5$ $=sqrt(3^2. 5)$

and applying radical rule $\sqrt[n]{ab}=\sqrt[n]{a}\sqrt[n]{b}$

$=3. sqrt5$

Nowm as per question,
= $sqrt5 -3.sqrt5$
= $-2 sqrt5$

How do you simplify sqrt5 - sqrt 45sqrt5 - sqrt 45?