LGBARIDDLE:

Provide a mathematical proof (algebraically) that an even integer multiplied to another even integer will always result to another even integer

i think this is how it went..hmmm i cant seem to recall bu try it! :D

Question

LGBARIDDLE:

Provide a mathematical proof  (algebraically) that an even integer multiplied to another even integer will always result to another even integer

i think this is how it went..hmmm i cant seem to recall bu try it! :D

kinggeorge · Answer

Let $a=2k_1$ and $b=2k_2$ so that both $a, b$ are even integers. Then $$ab=2k_1\cdot 2k_2=4k_1 k_2=2(2k_1k_2)$$Which is also an even integer. 

QED

lgbasallote · Answer

oh wow...that was fast o.O

kinggeorge · Answer

I've done it a few times :P

lgbasallote · Answer

psh. and they said it was impossible lol