( 2 - корень 6 )^2 - ( 5 + корень 2 )^2 =

1) ( 2 - V 6 )^2 = 4 - 4 V 6 + 6 = 10 - 4 V 6
2) - ( 5 + V 2 ) = - ( 25 + 10 V 2 + 2 ) = - ( 27 + 10 V 2 ) = - 27 - 10 V 2
3) 10 - 4 V 6 - 27 - 10 V 2 = - 17 - 4 V 6 - 10 V 2

(2-√6)²-(5+√2)²=4-4√6+6-25-10√2-2=-4√6-10√2-17