Question

1). (5,4 – 0,3x)(1,5x + 3,6) = 0;

Answer 1

Пошаговое объяснение:

$(5.4 - 0.3x)(1.5x + 3.6) = 0 \\ ( \frac{27}{5} - \frac{3}{10} x) \times ( \frac{3}{2} x + \frac{18}{5} ) = 0 \\ \frac{27}{5} - \frac{3}{10} x = 0 \\ \frac{3}{2} x + \frac{18}{5} = 0 \\ x = 18 \\ x = - \frac{12}{5} \\ x_{1} = - \frac{12}{5} = - 2.4. \: \: \: \: \: \: x_{2} = 18$