Given that | A-B + 3 | + (2a + b) ^ 2 = 0, find the value of (a + half times b) ^ 2 - (A-1 / 2b) ^ 2 &; (- 2Ab),

Given that | A-B + 3 | + (2a + b) ^ 2 = 0, find the value of (a + half times b) ^ 2 - (A-1 / 2b) ^ 2 &; (- 2Ab),

|a-b+3|+(2a+b)^2=0
so
a-b+3=0
2a+b=0
figure out
a=-1,b=2
(a+b/2)^2-(a-b/2)^2*(-2ab)
=(-1+1)^2-(-1-1)^2*(-2*(-1)*2)
=0-4*4
=-16
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Elden Ring Premiere

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