Attachment 20681

- Feb 5th 2011, 04:14 AMrcsis there any possible factor of the rational expression before will be solved ?
- Feb 5th 2011, 04:46 AMBAdhi
for the first one, multiply and divide by the conjugate of the numerator and use $\displaystyle (a^3-b^3)=(a-b)(a^2+ab+b^2)$

second one multiply and divide by the conjugate of the numerator twice..