What two numbers multiply to 18 but add to get - 5?

So this one has to be two negative numbers to get a positive number. so then you can think of what multipys to 18

-9*-2 wont work because - 9+-2 gets you - 11

-6*-3 wont work because - 6+-3 gets negative nine

i dont think there is one honestly. ive sat here and tried them all

2 and 9 6 and 3 and 18 and 1