Question

5x²=9x+2

(похуду з дескремінантом )​

Answer 1

Ответ:

$5x {}^{2} - 9x - 2 = 0 \\ d = 81 + 40 = 121 = {11}^{2}$

$x1 = \frac{9 + 11}{10} = \frac{20}{10} = 2$

$x2 = \frac{9 - 11}{10} = - \frac{2}{10} = - \frac{1}{5} = - 0.2$

Answer 2

Объяснение:

5х²=9х+2

5х²-9х-2=0

Д=9²-4×5×(-2)

х1= 2

х2=-1/5