Verified Answer :

apologiabiology

remember
-(-x)=+x since negatives cancel
and
+(-x)=-x

try to simplify parenthaseess first

r=9
b=5
g=-6
(r+b-g)(b+g)
(9+5-(-6))(5+-6)
(9+5+6)(5-6)
(14+6)(-1)
(20)(-1)
-20

garydesir1

(9+5+6)(5-6)

(20)(-1)

= -20

I hope that's help:0

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