Question

x la puterea 2 =25/81
4x la puterea 2 =9/32
va rog frumos:)

Answer 1

${x}^{2} = \frac{25}{81}$

$x = \pm\: \sqrt{ \frac{25}{81} }$

$x = \pm\: \frac{ \sqrt{25} }{ \sqrt{81} }$

$x = \pm\: \frac{5}{9}$

$4 {x}^{2} = \frac{9}{32}$

${x}^{2} = \frac{9}{32} \div 4$

${x}^{2} = \frac{9}{32} \times \frac{1}{4}$

${x}^{2} = \frac{9}{128}$

$x = \pm\: \sqrt{ \frac{9}{128} }$

$x = \pm\: \frac{ \sqrt{9} }{ \sqrt{128} }$

$x = \pm\: \frac{3}{8 \sqrt{2} }$

$x = \pm\: \frac{3 \sqrt{2} }{8 \sqrt{4} }$

$x = \pm\: \frac{3 \sqrt{2} }{8 \times 2}$

$x = \pm\: \frac{3 \sqrt{2} }{16}$