Question

Решите задачи на фото плз)

Answer 1

1)
$( \frac{7}{8} - \frac{1}{8} u^7)^2 = ( \frac{1}{8} u^7- \frac{7}{8} )^2= \frac{1}{64}u^{14}- \frac{7}{32}u^7+ \frac{49}{64}$
2)
t²+5x+9x² = t² + 5x + (3x)²

2·t·3x = 5x
$t= \frac{5x}{2*3x}= \frac{5}{6}$

$t^{2}= \frac{25}{36}$

Answer 2

$( \frac{7}{8} - \frac{1}{8} u^7)^2 = ( \frac{7}{8} )^2-2* \frac{7}{8} * \frac{1}{8}u^7 +( \frac{1}{8} u^7)^2= \frac{49}{64} - \frac{7}{32} u^7+ \frac{1}{64} u^{14}$


$t^{2} +5x+9 = 9x^2 + 5x + (3x)^2 2*t*3x=5x$
$t= \frac{5x}{2*6x} = \frac{5}{6}$

$t^2 = \frac{25}{36}$