We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
0
211
1
avatar+150 

help I am stuck on explaining this

 Sep 6, 2018
 #1
avatar+5224 
0

a + (-b) = a - b

 

(-a) + b = b - a

 Sep 7, 2018

19 Online Users

avatar
avatar
avatar