Question

Розв'яжіть рівняння:

Answer 1

Вот братан все что смог удачки

Answer 2

А)
$2 {x}^{2} - 3x + 7 = 7 {x}^{2} + x + 7 \\ 2 {x}^{2} - 3x = 7 {x}^{2} + x \\ 2 {x}^{2} - 3x - 7 {x}^{2} - x = 0 \\ - 5 {x}^{2} - 4x = 0 \\ - x \times (5x + 4) = 0 \\ - x = 0 \\ 5x + 4 = 0 \\ x = - \frac{4}{5}$
Б)
$(3x - 5)(3x + 5) = 6 {x}^{2} - 25 + 15x \\ 9 {x}^{2} - 25 = 6 {x}^{2} - 25 + 15x \\ 9 {x}^{2} = 6 {x}^{2} + 15x \\ 9 {x}^{2} - 6 {x}^{2} - 15x = 0 \\ 3 {x}^{2} - 15x = 0 \\ x = \frac{ - ( - 15) + - \sqrt{( - 15) {}^{2} - 4 \times 3 \times 0 } }{2 \times 3} \\ x = \frac{15 + - \sqrt{( - 15) {}^{2} - 0 } }{6} \\ x = \frac{15 + - \sqrt{( - 15) {}^{2} } }{6} \\ x = \frac{15 + - 15}{6} \\ x = \frac{15 + 15}{6} \\ x = \frac{15 - 15}{6} \\ x = 5 \\ x = 0$