упростите выражение
(1/2х^0,5+3у^0,5 -1/2х^0,5-3у^0,5)(2х-9/2у) при х=12,у=81
(1/2х^0,5+3у^0,5 -1/2х^0,5-3у^0,5)(2х-9/2у) при х=12,у=81
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( ------------- - ------------------ ) *(----------) =
2√х+3√у 2√х-3√у 2у
2√х-3√у - ( 2√х+3√у ) 2х-9
( -------------------------------------- ) *(----------) =
(2√х+3√у) *( 2√х-3√у ) 2у
-6√у 2х-9 -3 *(2х-9)
(------------) *(--------) = ----------------
4х - 9у 2у (4х-9у)*√у
-3*(2*12- 9) -3*15 -45 5
--------------------------- = ------------------ = ----------- = -------------
(4*12 - 9*81)*√81 (48-729) *9 -6129 681