Răspuns:
[tex]10x^{2} = \frac{125}{2} [/tex]
[tex]x^{2} = \frac{125}{2} \times \frac{1}{10} [/tex]
[tex]x = \sqrt{ \frac{125}{20} } [/tex]
[tex]x = \sqrt{ \frac{5 \times 5 \times 5}{20} } [/tex]
[tex]x = 5 \sqrt{ \frac{5}{20} } [/tex]
[tex]x = 5 \sqrt{ \frac{1}{4} } [/tex]
[tex]x = 5 \times \frac{1}{2} [/tex]
[tex]x = \frac{5}{2} [/tex]
