richyw
  • richyw
Having trouble with some algebra
Mathematics
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richyw
  • richyw
Having trouble with some algebra
Mathematics
schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
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lgbasallote
  • lgbasallote
welcome to the club
richyw
  • richyw
my solutions manual goes from \[\vec{E}=k_eq\left( \frac{1}{(x-a)^2}-\frac{1}{(x+a)^2}\right)\hat{i}\]to\[\vec{E}=k_eq\frac{4ax}{(x^2-a^2)^2}\hat{i}\] and I can't quite remember how to get that!
richyw
  • richyw
I can get to \[\vec{E}=k_eq\left(\frac{4ax}{(x-a)^2(x+a)^2}\right)\hat{i}\] so basically I have forgotten how to deal with the denominator :O

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richyw
  • richyw
without expanding it all out of course...
ganeshie8
  • ganeshie8
\(\vec{E}=k_eq\left(\frac{4ax}{(x-a)^2(x+a)^2}\right)\hat{i} \) \(\vec{E}=k_eq\left(\frac{4ax}{((x-a)(x+a))^2}\right)\hat{i} \)
richyw
  • richyw
oh wow
richyw
  • richyw
i need to sleep haha
ganeshie8
  • ganeshie8
haha i agree ;p
richyw
  • richyw
thanks a lot
ganeshie8
  • ganeshie8
np :)

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