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What is x^4-16? can that be done at a basic AlgII level? i think my teacher told us how, but i don't have my notes with me..

#### JacKz5o

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<div style="margin:20px;margin-top:5px;">
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<div>Originally Posted by <strong>cgrado</strong></div>
<div style="font-style:italic;">What is x^4-16? can that be done at a basic AlgII level? i think my teacher told us how, but i don't have my notes with me..</div>
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Its X to the square root of 4 minus 16.

#### Kamakazi

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(x^2+4)(x^2-4)<br>
or even farther down<br>
(x^2+4)(x-2)(x+2)

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<div style="margin:20px;margin-top:5px;">
<div class="smallfont" style="margin-bottom:2px;">Quote:</div>
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<div>Originally Posted by <strong>JacKz5o</strong></div>
<div style="font-style:italic;">Its X to the square root of 4 minus 16.</div>
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hm... we're not there yet. so i guess i shouldn't write that. just say it's prime. but we did cube roots. say,<br>
x^3-27<br>
would be (x-3)(x^2+3x+9)<br>
i think, i may have gotten a sign mixed up.

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<div style="margin:20px;margin-top:5px;">
<div class="smallfont" style="margin-bottom:2px;">Quote:</div>
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<div>Originally Posted by <strong>Kamakazi</strong></div>
<div style="font-style:italic;">(x^2+4)(x^2-4)<br>
or even farther down<br>
(x^2+4)(x-2)(x+2)</div>
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there we go, that's what i'm looking for. thanks. alright, i see how you got that.

#### Kamakazi

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No problem, good to see this education I pay tens of thousands for a year is coming in handy.

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<div style="margin:20px;margin-top:5px;">
<div class="smallfont" style="margin-bottom:2px;">Quote:</div>
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<div>Originally Posted by <strong>Kamakazi</strong></div>
<div style="font-style:italic;">No problem, good to see this education I pay tens of thousands for a year is coming in handy.</div>
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i pay 12,000 a year for high school education.<img alt="" class="inlineimg" src="/images/smilies/eek.gif" style="border:0px solid;" title="EEK!">

#### Kamakazi

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Well University of Missouri-Rolla costs a bit more than that <img alt="" class="inlineimg" src="/images/smilies/wink.gif" style="border:0px solid;" title="Wink">

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<div style="margin:20px;margin-top:5px;">
<div class="smallfont" style="margin-bottom:2px;">Quote:</div>
<table border="0" cellpadding="6" cellspacing="0" width="99%"><tr><td class="alt2" style="border:1px inset;">
<div>Originally Posted by <strong>Kamakazi</strong></div>
<div style="font-style:italic;">Well University of Missouri-Rolla costs a bit more than that <img alt="" class="inlineimg" src="/images/smilies/wink.gif" style="border:0px solid;" title="Wink"></div>
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ya, UNIVERSITY. i got to a "college preparatory".

#### Kamakazi

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Oh, nice, smart kid. Public High School for me, pretty much a joke if you ask me.

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lol, my public school (the one i'm zoned to) is good if you get in the upper classes. but texas schools generally aren't very good.

#### slydog64

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University of illinois, a good 20k a year.

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