Question

Simplify this radical

Answer 1

The given radical root 84, the simplification is option B; $2\sqrt{21}$.

What is a simplification of an expression?

Usually, simplification involves proceeding with the pending operations in the expression.

Simplification usually involves making the expression simple and easy to use later.

The given radical;

$\sqrt{84} \\\\\sqrt{42 \times 2} \\\\\sqrt{7\times3\times 2 \times 2} \\\\2\sqrt{21}$

Thus, the correct option is B; $2\sqrt{21}$.

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