<img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B21%20%7D%20%20%5Cdiv%20%20%5Csqrt%7B3%7D%20" id="TexFormula1" title=" \sqrt{21 }

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Pepsi [2]

3 years ago

\div \sqrt{3} " alt=" \sqrt{21 } \div \sqrt{3} " align="absmiddle" class="latex-formula">

Mathematics

1 answer:

melamori03 [73]3 years ago

6 0

Answer:

$\sqrt{7}$

Step-by-step explanation:

Using the rule of radicals

$\sqrt{\frac{a}{b} }$ ⇔ $\frac{\sqrt{a} }{\sqrt{b} }$

$\frac{\sqrt{21} }{\sqrt{3} }$ = $\sqrt{\frac{21}{3} }$ = $\sqrt{7}$

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