# Show an Expression is a Multiple of 4

• May 5th 2011, 07:10 AM
andyboy179
Show an Expression is a Multiple of 4
hi,

m is an integer.

show that (m+2)^2-m^2-4 is a multiple of 4.

i really don't know how to do this so could someone please try and explain this sort of question to me please?!

thanks!
• May 5th 2011, 07:43 AM
FernandoRevilla
Quote:

Originally Posted by andyboy179
hi,m is an integer. show that (m+2)^2-m^2-4 is a multiple of 4.

$(m+2)^2-m^2-4=...=4m$