Question

Решите пожалуйста уравнение ​

Answer 1

$9x^{2} + 10x + 1 = 0\\D = b^{2} - 4ac \\D = 10^{2} - 4 * 9 * 1 = 100 - 36 = 64$

$X1 =\frac{-10-\sqrt{64} }{2*9} = \frac{-10-8}{18}= -1\\X2 =\frac{-10+8}{18} = \frac{-2}{18} = -\frac{1}{9}$