Question

Решите пожалуйста номер 4

Answer 1

$frac{(x + 1) {}^{2} }{6} + frac{(x - 1) {}^{2} }{12} - frac{x {}^{2} - 1 }{4} = 1$

умножим обе части на 12

$frac{(x + 1) {}^{2} times 12 }{6} + frac{(x - 1) {}^{2} times 12 }{12} - frac{(x {}^{2} - 1) times 12 }{4} = 1 times 12 \ 2 (x + 1) {}^{2} + (x - 1) {}^{2}- 3 (x {}^{2} - 1) = 12 \ 2 (x {}^{2} + 2x + 1) + (x {}^{2} - 2x + 1) - 3 (x {}^{2} - 1) = 12 \ 2 {x}^{2} + 4x + 2 + x {}^{2} - 2x + 1 - 3x {}^{2} + 3 = 12 \ 2x = 6 \ x = 3$

Ответ:3

Answer 2

Спасибо большое

Answer 3

не за что))

Answer 4

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!