Question

решитеееее плиз 
 $frac{4- sqrt{2} }{4+ sqrt{2} } - frac{4+ sqrt{2} }{4- sqrt{2} }$

Answer 1

$frac{4- sqrt{2} }{4+ sqrt{2} } - frac{4+ sqrt{2} }{4- sqrt{2} } = frac{(4- sqrt{2} )^2-(4+ sqrt{2} )^2}{(4+ sqrt{2} )(4- sqrt{2} )} = frac{(4- sqrt{2} -4- sqrt{2} )(4- sqrt{2} + 4+ sqrt{2} )}{4^2- (sqrt{2} )^2} = \ = frac{-2 sqrt{2} cdot8}{16-2} = frac{-16 sqrt{2}}{14} = frac{-8 sqrt{2}}{7}$

Answer 2

Спасибо огромное !!!!! =)