x₁ = - 1, 25
x₂ = 1,25
Răspuns:
[tex]4x {}^{2} = 6 \frac{1}{4} \\ \\ 4x {}^{2} = \frac{25}{4} \: | : 4\\ \\ x {}^{2} = \frac{25}{4} \times \frac{1}{4} \\ \\ x {}^{2} = \frac{25}{16} \\ \\ x = ± \sqrt{ \frac{25}{16} } \\ \\ x = ± \frac{5}{4} \\ \\ x 1 = - \frac{5 }{4} = - 1,25 \\ \\ x2 = \frac{5}{4} = 1,25[/tex]
