Mark brainliest

6-(-9)=?
-2-(-3)=?

6-(-9)= 15

-2-(-3)= 1

Step-by-step explanation:

the two negatives cross eachother out which makes it positive on the first one so you add them. and in the second one the same thing happens except it's a negative two which gives you -2+3 which gives you one.