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forum.virtualchallengemeets.com • View topic - ab *ba

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ab *ba

Eighty problems in ten minutes. What's so hard about that?
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ab *ba

Postby Celsion » Wed Mar 07, 2007 12:03 am

What's the simplest way of multiplying [unparseable or potentially dangerous latex formula]? Such as [unparseable or potentially dangerous latex formula]. I usually use LOIF (Last, Outside, Inside, First) to multiply 2 two-digit numbers.
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Postby hhhsmath06 » Wed Mar 07, 2007 12:12 am

just do a 2 digit foil, no trick.

q
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Postby Celsion » Wed Mar 07, 2007 12:16 am

Thanks, I thought so lol. I just use LOIF.
Last edited by Celsion on Wed Mar 07, 2007 12:20 am, edited 1 time in total.
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Re: ab *ba

Postby stupidityismygam » Wed Mar 07, 2007 12:17 am

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Postby Quelloquialism » Wed Mar 07, 2007 4:05 am

I hate to say it, but everybody is wrong.

It's not FOIL.
It's not LOIF.
It's not LIOF.
It's FIOL.

Sheesh.

=D
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Postby bradp » Wed Mar 07, 2007 5:24 pm

when i do things like 21 x 12... i do it backwards.

20 * 10 + 10*1 + 20*2 + 2...

but I switch to starting from the front for things like 133 x 211
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Postby zefuri » Tue Apr 10, 2007 5:05 pm

iono LIOF sounds kinda funny...i tried setting it equal to (10a+b)(10b+a) but theres nothing
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