Question

2x la a doua egal cu 25 pe 2

Answer 1

$2 {x}^{2} = \frac{25}{2} \: | \div 2$

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

${x}^{2} = \frac{25}{2} \times \frac{1}{2}$

${x}^{2} = \frac{25 \times 1}{2 \times 2}$

${x}^{2} = \frac{25}{4}$

$x = \pm \sqrt{ \frac{25}{4} }$

$x = \pm \frac{ \sqrt{25} }{ \sqrt{4} }$

$x = \pm \frac{5}{2}$