Question

помогите пожалуйста решить уравнения

Answer 1

${(7x - 5)}^{2} + 67x - 49 {x}^{2} = - 2 \\ 49 {x}^{2} - 70x + 25 + 67x - 49 {x}^{2} + 2 = \\ 3x + 27 = 0 \\ 3x = - 27 \\ x = \frac{ - 27}{3} \\ x = - 9$
$196 {x}^{2} - {(14x + 3)}^{2} + 80x = - 5 \\ 196 {x}^{2} - (196 {x}^{2} + 84x + 9) + 80x = - 5 \\ 196 {x}^{2} - 196 {x}^{2} - 84x - 9 + 80x = - 5 \\ - 4x = - 5 + 9 \\ - 4x = 4 \\ x = \frac{4}{ - 4} \\ x = - 1$