Question

Решите уравнения 5х²-11х+2=0

Answer 1

Ответ:

0,2;2

Объяснение:

$5 {x}^{2} - 11x + 2 = 0 \\ D = {11}^{2} - 4 \times 5 \times 2 = 121 - 40 = 81 = {9}^{2} \\ x_{1} = \frac{11 - 9}{5 \times 2} = \frac{2}{10} = 0.2 \\ x_{2} = \frac{11 + 9}{5 \times 2} = \frac{20}{10} = 2$