rationalize the denominator. http://www.mathway.com/math_image.aspx?p=SMB02FSMB03-5xSMB02ESMB034SMB02eSMB03SMB10SMB02RSMB038x+10SMB02rSMB03SMB02fSMB03?p=67?p=42

Question

anonymous · Answer

$$
\frac{5 x^4 \sqrt{8
   x+1}}{\sqrt{8 x+1} \sqrt{8
   x+1}}=-\frac{5 x^4 \sqrt{8
   x+1}}{8 x+1}
$$

anonymous · Answer

How. Just hwo do you do it so quickly? ;)

anonymous · Answer

wow, put a lot of effort into that, thanks

anonymous · Answer

$$
-\frac{5 x^4 \sqrt{8
   x+1}}{\sqrt{8 x+1} \sqrt{8
   x+1}}=-\frac{5 x^4 \sqrt{8
   x+1}}{8 x+1}
$$
I forgot a minus sign.