Question

9х^2+8=18х
Ркшиииите квадратное уровнение плиссссс​

Answer 1

Ответ:

$x_1 = 1 \frac{1}{3} \\ x_2 = \frac{2}{3}$

Объяснение:

$9 {x}^{2} + 8 = 18x \\ 9 {x}^{2} - 18x + 8 = 0 \\ D = {( - 18)}^{2} - 4 \times 9 \times 8 = 324 - 288 = 36 \\ \sqrt{D} = \sqrt{36} = 6 \\ x_1 = \frac{18 + 6}{2 \times 9} = \frac{24}{18} = \frac{4}{3} = 1 \frac{1}{3} \\ x_2 = \frac{18 - 6}{2 \times 9} = \frac{12}{18} = \frac{4}{6} = \frac{2}{3}$