Odpowiedzi

2009-10-03T14:30:46+02:00
2* 5/7)² - ( 1 -9/7 ) = (4x24/49)-(1-9/7)=100/49-1+9/7=100/49+2/7=100/49+14/49=114/49=2 i 16/49
2009-10-03T14:34:04+02:00
(2*5/7)²-(1-9/7)= (10/7)-(1-⁹/₇)= ¹⁰/₇² - (-⁵/₇)=¹⁰⁰/₁₄ + ⁵/₇= ⁵⁰/₇+⁵/₇=⁵⁵/₇
2009-10-03T14:34:39+02:00
( 2* 5/7)² - ( 1 -9/7 )=(10/7)²-(7/7-9/7)=100/49-(-2/7)=100/49+2/7=100/49+14/49=114/49=2i16/49