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[tex] \frac{5}{x} = \frac{36x}{5} [/tex]

Răspuns :

36x²=25
x²=25/36

x₁=5/6
x₂=(-5/6)
\frac{5}{x} = \frac{36x}{5}  
Produsul mezilor= Produsul extremilor, adica  36x × x=5×5

                                                                          36x²=25
                                                                           x²=25/ 36
                                                                           x=√25/√36
                                                                          x=5/6  ⇔x₁=+5/6 ;    x₂=- 5/6