
#1
Sep2613, 02:09 PM

P: 354

Is [itex]\vec{a}[/itex]+[itex]\vec{b}[/itex][itex]^{2}[/itex] equal to the same thing as ([itex]\vec{a}[/itex]+[itex]\vec{b}[/itex])[itex]^{2}[/itex]? And when is it equal to √(a[itex]^{2}[/itex]+b[itex]^{2}[/itex])?
Thanks. 



#2
Sep2613, 02:45 PM

Mentor
P: 21,012

[itex](\vec{a} +\vec{b})^2 [/itex] Or instead of the itex tags, you can use ## delimiters at the front and back. 



#3
Sep2713, 12:40 AM

P: 354

Thank you for the reply and the tip. But about the √(a^2+b^2)?? My second part of the question?




#4
Sep2713, 01:41 AM

P: 32

Squaring of vectors in absolute value 



#5
Sep2713, 02:08 AM

PF Gold
P: 1,023





#6
Sep2713, 02:09 AM

P: 354

Okay. Thank you, yes, it is exactly what I meant.



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