Question

help.......❤️va rog​

Answer 1

Răspuns:

$\mathbf{x =\pm \frac{5}{ 3} }$

Explicație pas cu pas:

$\mathbf{d) \: {x}^{2} = 0.2(7) }$

$\mathbf{0.2(7) = \frac{27 - 2}{9} = \frac{25}{9} }$

$\mathbf{ {x}^{2} = \frac{25}{9} \Longleftrightarrow \: x =\pm \sqrt{ \frac{25}{9} }\Longleftrightarrow \: x =\pm \frac{5}{3} }$

$\mathbf{\Longrightarrow \: S = \left\{ - \frac{5}{3}; \frac{5}{3} \right\}}$

Bafta!