Find the distance from the tip of Vector C to the plane through the origin spanned by A and B.

Let:

A = 3i + j + 2k.
B = 4i + j + 5k.
C = i - j + k

Are they asking for me to find an equation for the plane that contains vectors A and B [basically take the cross product for then normal then have it pass through the origin] and then find the distance of vector C from that plane is?

This textbook lacks pictures and makes it hard to visualize for me sometimes....

Thanks in advance.

"Are they asking for me to find an equation for the plane that contains vectors A and B [basically take the cross product for then normal then have it pass through the origin] and then find the distance of vector C from that plane is?"

Yes they are. If you really want me to I'll work it out but it sounds like you know what you're doing.