They do not work. Your Dell PC can handle DDR3 ram, and it has a DDR3 motherboard. The ram you have is a DDR4 ram. It is not compatible with the same motherboard.
I was gifted a couple of memory modules that are identified as: 8GB 2Rx8 PC4-2133P-UB0-10; HMA41GU6AFR8N-TF N0 AC 1548. Will these modules work in my XPS 8700?
XPS 8700, memory