(1775 - 1836) . , , : "! , ". , , , . .

" ", "" " ". .
18.03.2013

LiveJournal Vkontakte Facebook Twitter

1...2...3 4 

9 + 32.

____________________________

:

9 + 32 = 9 + 28 = 1 + 28 + 8 = (1 + 8)2 = 1 + 8 = 1 + 22.

: 1 + 22.


19 - 2√70.

_____________________________

:

x2 - 19x + 70 = 0.

x1 = 5; x2 = 14.

19 - 2√70 = (√14 - √5)2 = √14 - √5.

: √14 - √5.


17 - 49 + 4√5.

_________________________________

, .

17 - 49 + 4√5 = 17 - 44 + 4√5 + 5 = 17 - 4(2 + √5)2 = 17 - 4(2 + √5) = 9 - 4√5 =

5 - 4√5 + 4 = (√5 - 2)2 = √5 - 2.

: √5 - 2.


428 - 16√3.

______________________________

428 - 2√192 .

x2 - 28x + 192.

: x1 = 16; x2 = 12.

428 - 2√192 = 4(√16 - √12)2 =
4 - 2√3 = 3 - 2√3 + 1 = (√3 - 1)2 = √3 - 1.

: √3 - 1

.
1...2...3 4 
2009-2012 . " - !" - , . .
Rambler's Top100