[a+2]2=-1

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Solution for [a+2]2=-1 equation:


[a+2]2=-1

We simplify the equation to the form, which is simple to understand 
(a+2)2=-1

Reorder the terms in parentheses
(+2a+4)=-1

Remove unnecessary parentheses
+2a+4=-1

We move all terms containing a to the left and all other terms to the right. 
+2a=-1-4

We simplify left and right side of the equation. 
+2a=-5

We divide both sides of the equation by 2 to get a. 
a=-2.5

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