Question

4x^2=12,25
решите уравнение

Answer 1

$4x {}^{2} = 12.25 \\ 4x {}^{2} = \frac{49}{4} \\ x {}^{2} = \frac{49}{16} \\ x = \sqrt{ \frac{49}{16} } = ( + - ) \frac{7}{4} \\ x1 = \frac{7}{4} \\ x2 = - \frac{7}{4}$