Question

Racionalizando
$\frac{12}{ \sqrt{8} }$
teremos:

a)
$3. \sqrt{8} \\ 2$
b)
$6. \sqrt{8} \\ 5$
c)
$12. \sqrt{8}$

d)
$3. \sqrt{2} \\ 8$

​

Answer 1

$\boxed{\begin{array}{l}\sf\dfrac{12}{\sqrt{8}} =\dfrac{12\sqrt{8}}{8}\\\sf =\dfrac{\diagup\!\!\! 4\cdot3\cdot\diagup\!\!\!\!2\sqrt{2}}{\diagup\!\!\!\!4\cdot\diagup\!\!\!\!2}\\\sf=3\sqrt{2}\end{array}}\blue{\checkmark}$