Question

Сделайте пожалуйста полностью, очень надо!!!
Заранее спасибо ​

Answer 1

${x}^{2} + \frac{49}{ {x}^{2} } = 50 \\ \frac{ {x}^{4} + 49}{ {x}^{2} } = 50 \\ {x}^{4} + 49 = 50 {x}^{2} \\ {x}^{4} + 49 - 50 {x}^{2} = 0 \\ {x}^{4} - 50 {x}^{2} + 49 = 0 \\ {x}^{2} = t \\ {t}^{2} - 50t + 49 = 0 \\ {t}^{2} - t - 49t + 49 = 0 \\ t(t - 1) - 49(t - 1) = 0 \\ (t - 1)(t - 49) = 0 \\1) t = 1 \\ 2)t = 49 \\ 1.1){x }^{2} = 1 \\ x = + . - 1 \\ 2.1) {x}^{2} = 49 \\ x = + . - 7$

$1) - 7 - ( \frac{7}{ - 7} ) = - 7 + 1 = - 6 \\ 2) - 1 - ( \frac{7}{ - 1} ) = - 1 + 7 = 6 \\ 3)1 - \frac{7}{1} = 1 - 7 = - 6 \\ 4)7 - \frac{7}{7} = 7 - 1 = 6$