Question

Плис помогите с алгеброй :>

Answer 1

Ответ:

№1

$\frac{1}{10g - 1} + \frac{1}{5g - 2} = 0 \\ \frac{10g - 1 + 5g - 2}{(10g - 1)(5g - 2)} = 0 \\ \frac{15g - 3}{(10g - 1)(5g - 2)} = 0$

g≠1/10 и g≠2/5:

$15g - 3 = 0 \\ 15g = 3 \\ g = \frac{3}{15} \\ g = \frac{1}{5}$

№2

$5 {x}^{2} - 18x + 9 = 0 \\ a = 5 \: b = - 18 \: c = 9 \\ D = ( - 18 {)}^{2} - 4 \times 5 \times 9 = 324 - 180 = 144 \\ \sqrt{144} = 12 \\ x½ = \frac{18±12}{10} = 3; \: 0.6$

x1=3, x2=0,6