i am looking, you might be able to, but without having one to open up, can't tell for sure yet.... Maybe not, the more I look. I have an hp notebook using an a6 apu, and it's soldered, similar product number as yours... but half as expensive.
this thread was solved, see what they say
https://h30434.www3.hp.com/t5/Noteb...my-HP-Laptop-15-bs0xx-upgradable/td-p/6649156
"The processor and graphics card are not upgradable as they come integrated on the motherboard (soldered), so youu would need to replace the motherboard which would most likely cost as much as buying new PC with desired specs. "
as I thought, but you can upgrade to an ssd and 8gb of ram