Question

решите уравнение 9х2-361=0​

Answer 1

$9 {x}^{2} - 361 = 0 \\ (3x - 19)(3x + 19) = 0 \\ x1 = \frac{19}{3} = 6 \frac{1}{3} \\ x2 = - \frac{19}{3} = - 6 \frac{1}{3}$