1 vector in 3 space forms a line
2 vectors in 3 space at most forms a plane and forms a line if they aren't lin. ind.
Since we are given that and v_2 are lin. ind., we know they form a plane.
Suppose is a normal vector to our plane then our equation would be:
Where is a point in the plane.
You are giving a point is the origin (0,0,0). All you need is a normal vector now.