Hi there. Im tryin to solve this one, I know that if I find the way to get one more vertex i'd have it solved.
The point A(-1,8) is the vertex of a rhombus which minor diagonal is situated on the line L:
, . Get the coordinates of the rest of the vertex knowing that the rhombus area is 30.
Well, I haven't done too much. Actually I did some, but then I realized that I had confused something, cause I got the line L' where would be located the major D, but I've used for it the point A, and then I was trying to get the point of intersection between L and L', so then I doubled it, and I was going to get my second vertex, but then I realized that it was wrong, cause I couln't use point A, cause A don't belongs to L', it belongs to L, so...
So, I don't know much about L', but that its perpendicular to L.
I think it's enough data, I know that the major diagonal will be located on a line L', perpendicular to L, that its the line it gives. And it gives me the point A. Now, I had a misunderstood again, Im not sure if A belongs to L, I'll corrobore it. If it doesn't will be easy to solve it, cause then A belongs to L', and actually I was on the right way.