Correct. 15 not 15X.
And Jorgvaz....your answers seem different to the ones in the book. Is that because of my 15X and not 15 alone?
It is 2 "ex" squared minus 7 ex minus fifteen, so you can see how I mean. The X may mean times to some but it is X not times...
Thanks so far people. Appreciate your efforts! Just not exactly the answer in the book, possibly my mistake.
Dan
and John, everything you said is correct about the root values....sorry, I should have re-written my questrion..thanks for understanding anyhow...