[lit-ideas] Re: Don't Laugh (Math)
- From: JimKandJulieB@xxxxxxx
- To: lit-ideas@xxxxxxxxxxxxx
- Date: Fri, 23 Jun 2006 17:40:58 EDT
<Meekly raising hand> -- What does the carrot top symbol in superscript
mean??
Julie Krueger
========Original Message======== Subj: [lit-ideas] Re: Don't Laugh
(Math) Date: 6/23/06 4:12:00 P.M. Central Daylight Time From:
_ritchierd@xxxxxxxxxxxxxx (mailto:ritchierd@xxxxxxxxxxxxx) To:
_lit-ideas@xxxxxxxxxxxxxx
(mailto:lit-ideas@xxxxxxxxxxxxx) Sent on:
Hi Erin,
my dad asked me if I knew how to do this, and coincidentally, we just
went over this this year in math class.
How you solve the problem is you first multiply out (x+y)^4, which
gives you, if you don't simplify it completely,
(x^2+2xy+y^2)(x^2+2xy+y^2). This is the same as the first equation,
only multiplied by itself, so to get the answer, you need to multiply
the 9 by itself, which gives you 81. I hope this helps.
Julia Ritche
On Jun 23, 2006, at 12:35 PM, Erin Holder wrote:
> OK, who can explain to me how to solve this:
>
> If x^2+2xy+y^2 = 9 then (x+y)^4 = ?
>
> I know the answer is "81", I just don't know how to get it. It's
> starting to
> frustrate me. I haven't done this stuff in almost ten years, and I
> can't for
> the life of me remember how to go about it (although I seem to be
> getting the
> hang of some of the other ones...?)
>
>
> Erin
> TO
>
>
>
>
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