Obliczenie: D0a7Z0 - 1
x1* x2+ y1* y2 =
0
0
|
x1* x2+ y1* y2 = 0$$x1\cdot x2+y1\cdot y2$$ = $$0$$
x1* x2 = 0- y1* y2$$x1\cdot x2$$ = $$0-y1\cdot y2$$
x1* x2 = - y1* y2$$x1\cdot x2$$ = $$-y1\cdot y2$$
x1 = -
$$x1$$ = $$-\frac{y1\cdot y2}{x2}$$
| y1* y2 |
| / x2 |