I have been doing good so far with these problems but I have hit a road block and just can't seem to get pass it. The problems is as follows:

equation is 2x^2-4x+5=0 and the roots are a and b. I am suppose to finde the value of 1/(a+1) + 1/(b+1). I have already fond that a+b= -b/a = -(-4/2)= 2 and ab=c/a=5/2. Is there anyone out there who can help me?