How do you simplify $sqrt84$ ?

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Answer 1 · 2016-04-04T16:55:33

$= 2 sqrt ( 21)$

$sqrt (84)$

We first prime factorise $84$ ( express it as a product of prime factors)

$sqrt (84) = sqrt ( 2 * 2 * 3 * 7)$

$= sqrt ( 2^2 * 3 * 7 )$

$= sqrt ( 2^2 * 21 )$

$= 2 sqrt ( 21)$

How do you simplify sqrt84sqrt84?