can someone show me how to find the length of vector v whose initial point is (4,0) and terminal point is (-2,1)

Question

3mar · Answer

Could I help you?

3mar · Answer

Are you familiar with that? @zaxoanl

zaxoanl · Answer

thank you @3mar

3mar · Answer

Don't mention it!
You are welcome!
What matters is that you got the idea!
Did you?

zaxoanl · Answer

i have another question   
Find the equation of the line that passes through (-4,5,2) and is parallel to both the xz-plane and yz-plane.  

i got y-5=0   y=5
         x+4=0    x=-4

zaxoanl · Answer

the equation  would be  (x+4)+(y-5)+(z-2)=0 right?

3mar · Answer

It would better to start your second question in another new post if you don't mind!