A:Answer Per Dell:
"The following table lists the memory specifications of your Inspiron 14 7425 2-in-1. Table 1. Memory specifications.
Memory configurations supported: 4 GB, 1 x 4 ...
Memory slots: Two-SODIMM slots
Memory size per slot: 4 GB, 8 GB, 12 GB, 16 GB, ...
Memory speed: 3200 MHz"
And Crucial is willing to tell you what they carry... Best Buy will be glad to sell it to you. I suggest Geek Squad to do it, if you're unskilled.
