# Intersect - command in CAS & order - bug?

Hellsla shared this problem 8 months ago
Solved

Hi,

If I have defined f: 28x+45y=5119 and c: (x-43)^2+(y-87)^2=11236 and I try to find their points of intersection in GeoGebra Classic 6 the command Intersect(f,c) returns ? and intersect(c,f) returns {(-47,143),(133,31)}. So depending on the order, it depends do I get an answer. Is this a bug? If not should it be written on the manual?

(see the attached file for a screenshot of the situation)

Br, Lauri

1

`If not should it be written on the manual? `

manual says

```Examples:

Intersect( <Line> , <Object> ) creates the intersection point(s) of a line and a plane, segment, polygon, conic, etc.```
in CAS syntax. So there is a bug

1

Terve, Lauri! :)

Take care!

1

`{Intersect(28x + 45y = 5119,(x - 43)² + (y - 87)² = 11236)}`

1

Terve Simona :D

Here is a screenshot from GeoGebra 6 Classic with the same curves with braces and in different order.

One returns ? and the other returns the intersection point.

Br, Lauri

1

This is GeoGebra 5

Like mathmagic said it is a bug.

1

Will be fixed soon!

1