Here's the question you clicked on:
burhan101
Find three points on this plane: [x, y, z ]= [3, 4, -1] +s [1, 1, -4 ] +t [2, -5, 3 ]
Have you considered selecting three values for s and t?
Just any random numbers to substitute and the come up with the answer like that ?
Yep. Furthermore, make the calculations idiot proof by selecting simple numbers. I would use (s,t)=(0,0),(0,1),(1,0) to make the calculations as simple as possible..
Random is not necessary. You can be arbitrary.
No sweat. Do math every day.