PLEASE HELP!!
1. FACTORISE x2 - bx- a2 -5ab -6b2
2. a/b + b/a =1 , find the value of a3 + b3
There is probably a nice little trick to this. But I don't see it.
So let's do it the hard way.
If this is going to factor it will be of the general form:
When we expand this we get
Comparing this to your expression we get
The solution to this system is fairly simple to derive and gives c = 1, d = 2, e = -1, and f = -3.
So
-Dan