Question

РЕШИТЕ ВСЁ НА ФОТО СРОЧНО

Answer 1

а)

$7 {x}^{2} - 8x + 6 = 0$

б) 1)

$5 {x}^{2} + 6x = 0 \\ x(5x + 6) = 0 \\ x = 0 \\ 5x + 6 = 0 \\ 5x = - 6 \\ x = - \frac{6}{5}$

х1=0 х2=-6/5

б) 2)

$8 {x}^{2} - 32 = 0 \\ 8( {x}^{2} - 4) = 0 \\ {x}^{2} - 4 = 0 \\ {x}^{2} = 4 \\ x = \sqrt{4} \\ x = + - 2$

х1 = 2 х2 = -2