Question

Пожалуйста Братцы решите первое​

Answer 1

$- (x {}^{ - 6} ) {}^{ - 2} div x {}^{14}$

$- (x {}^{12} ) div x {}^{14}$

$- frac{x {}^{12} }{ {x}^{14} } = - frac{1}{x {}^{2} }$

$- frac{1}{2 {}^{2} } = - frac{1}{4} = - 0.25$

Answer 2

$- ( {x}^{ - 6} ) { }^{ - 2} div x {}^{14} = \ = - x {}^{( - 6) times ( - 2)} div x {}^{14} = \ = - frac{ x {}^{12} }{ {x}^{14} } = \ = - frac{ 1}{ {x}^{2} } ; \ x = 2; \ - frac{1}{2 {}^{2} } = - frac{1}{4}$



$sqrt{25} - sqrt{2} times sqrt{8} = \ = sqrt{5 {}^{2} } - sqrt{2} times sqrt{2 {}^{2} times 2 } = \ = 5 - sqrt{16} = 5 - 4 = 1$