Odpowiedzi

2010-01-27T21:36:53+01:00
7³ - 3 × 7² × 2√3 + 3 × 7 ×( 2 √3)² - (2 √3)³=
343 - 294 √3 + 252 - 24 √3 =
593-318 √3


125^ 2/3= (5³)^2/3= 5²=25
2010-01-27T21:37:01+01:00
(a-b)³=a³-3a²b+3ab³-b³

(7-2√3)³=343-294√3+504√3-24√3
=186√3+343
2010-01-27T21:40:34+01:00
(a-b)³=a³-3a²b+3ab²-b³
(7-2√3)³=7³-3*7²*2√3+3*7*(2√3)²-(2√3)³=343-294√3+21*12-24√3=
343+252-318√3=595-318√3

125⁻⅔=(1/125) do potęgi ⅔=(1/∛125) ²=(1/5)²=1/25