Posted by Michael on Sunday, December 2, 2012 at 7:52pm.
Sorry. I don't know.
2x/((x-4)(x+4)) + 7/(x-4) so the LCD is (x-4)(x+4) = 2x/((x+4)(x-4) + 7(x+4)/((x+4)(x-4)) = ( 2x + 7x + 28)/((x+4)(x-4)) = (9x+28)/(x^2 - 16)