[RESOLVED] Help!

[Yunie]

What does Ia - bI means? (Note: I <<< is a line, not I)

Thanks. :)

[Logophobic]

|a-b|
Absolute value of (a-b)

[Yunie]

|a-b|
Absolute value of (a-b)


So, if a = (-2,1) and b = (4,6), how do I use the 2 given values to solve by using |a-b|? Can show me the steps? Thanks. :)

[Yunie]

Someone help me please?

[krtxmrtz]

Well, if a and b are vectors then |a - b| then this absolute value is to be understood as the modulus of their difference.

If a = (a1,a2) and b = (b1,b2) then,

|a - b| = Sqr{(a1 - b1)2 + (a2 - b2)2}

[krtxmrtz]

So, if a = (-2,1) and b = (4,6), how do I use the 2 given values to solve by using |a-b|? Can show me the steps? Thanks. :)
|a - b| = Sqr(61)

[Yunie]

Hey thanks krtxmrtz!!! :) :thumb:

[krtxmrtz]

Hey thanks krtxmrtz!!! :) :thumb:
No problem.
You're welcome to rate my post ;)

[timeshifter]

So, if a = (-2,1) and b = (4,6), how do I use the 2 given values to solve by using |a-b|? Can show me the steps? Thanks. :)

If you're looking for the absolute value of the distance between the two points, then krtxmrtz's answer was indeed correct. However, if you're just looking for the new point, it's simple subtraction. (-2,1) - (4,6) = (-6, -5), and the absolute value of that would be (6,5).

Note that |a-b| is distinctly different from |a| - |b|.

[Yunie]

No problem.
You're welcome to rate my post ;)

I have rated your post. Thanks. ;)

[Yunie]

If you're looking for the absolute value of the distance between the two points, then krtxmrtz's answer was indeed correct. However, if you're just looking for the new point, it's simple subtraction. (-2,1) - (4,6) = (-6, -5), and the absolute value of that would be (6,5).

Note that |a-b| is distinctly different from |a| - |b|.

I see I see...Thanks for telling that. :)