Question

(a - b)*2- c*2
Quando a =2/3
b=1
c= -1

Answer 1

(a-b)^2-c^2=
(2/3-1)^2-(-1)^2=
(2/3-3/3)^2-1=
(1/3)^2-1=
1/9-1=
1/9-9/9=
-8/9