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sylwia: Doprowadź do najprostszej postaci :
(1+x−1)−2−(1−x−1)−2
24 maj 18:30
Basia:
= (1+
1x)
−2 − (1−
1x)
−2 =
(
x+1x)
−2 − (
x−1x)
−2 =
(
xx+1)
2 − (
xx−1)
2 =
(
xx+1 −
xx−1)*(
xx+1+
xx−1) =
| x(x−1)−x(x+1) | | x(x−1)+x(x+1) | |
| * |
| =............... |
| (x−1)(x+1) | | (x−1)(x+1) | |
dalej już policz sama
24 maj 18:36