I need help.
I want to use the quotient rule to find
So I do
=
=
=
=
but the answer in the book is
=
What Am I doing wrong?
No problem.
Here is where you went wrong, I have put brackets round the second term in the numerator to make it easier to see. What you did is say that but the minus sign needs to be applied to both terms. I find it helps to imagine the minus sign as -1 and to then use the distributive law:=
I may have explained this poorly so please post back if you don't understand (and it's good to check both ways)