Given a-2a + 4B + 4B + 2 = 0, the value of a + B is
A-2a + 4B + 4B + 2 = 0,
(a-1)^2+(2b+1)^2=0
So A-1 = 0, 2b + 1 = 0
a=1 b=-1/2
a+b
=1-1/2
=1/2
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