Hola!!
The only way one can be sure about the what type of RAM is to either check the existing memory or the specification of the laptop model.
Safe : http://www.amazon.com/Dv5-1133la-Dv5-1134tx-Dv5-1135ee-...
I do not recommend the above memory as the details you have provided does not suffice to suggest the right memory. There are many DV5 series laptops and the memory specifications are different with some models and same with the other. One of the most interesting thing is that the recent laptops support DDR3 (notable
HP Pavilion dv5-2139la) memory while the older models support DDR2 (eg. DV5-1235DX), so without confirming the exact model and recommending the memory is kinda premature I think.
If you could let me know your HP product number (should something like this - RQ756AU#ABA. You can find it beneath the laptop or under the battery compartment. It is not the Microsoft product key.) then I can confirm if the memory is compatible. Looking forward to your reply.