Answer:

-17 and -15

Step-by-step explanation:

see that two number back this serie is going so here -25 and two back will be -23 ok now -23 two back numbers will be -21 as ame method -21 two back will be -19 and -19 two back will be -17 and -17 two back which is -15.

I hope you understand mark me as brianliest.