# is there any possible factor of the rational expression before will be solved ?

• Feb 5th 2011, 05:14 AM
rcs
is there any possible factor of the rational expression before will be solved ?
• Feb 5th 2011, 05:46 AM
for the first one, multiply and divide by the conjugate of the numerator and use $(a^3-b^3)=(a-b)(a^2+ab+b^2)$