Question

Simplify this radical. /84

Answer 1

$\sqrt{84}$
$\sqrt{4 \times 3 \times 7}$
$2\sqrt{21}$

Answer 2

Answer:

$\sqrt{84}=2\sqrt{21}$

Step-by-step explanation:

we need to simplify the radical $\sqrt{84}$

84 can be written as $2 \cdot 2 \cdot 3 \cdot 7$

$\sqrt{84}=\sqrt{2 \cdot 2 \cdot 3 \cdot 7}$

square root (2*2)= 2

$\sqrt{84}=2\sqrt{3 \cdot 7}$

$\sqrt{84}=2\sqrt{21}$