Odpowiedzi

2010-03-08T22:09:05+01:00
∛64 =4
(√7 - 2)(√7 + 2) = (7-4)=3
(0,75)⁻² = (3/4)⁻²=(4/3)²=16/9
(-1,5)⁻² =(-3/2)⁻²=(-2/3)²=4/9

4-3 / (16/9 + 4/9) = 1/ (20/9) = 9/20 = 0,45

1,8 - 100%
0,45 - x

1,8x= 45 |:1,8
x=25%
6 5 6