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-(x+8)2=0
We simplify the equation to the form, which is simple to understand
-(x+8)2=0
Reorder the terms in parentheses
-(+2x+16)=0
Remove unnecessary parentheses
-2x-16=0
We move all terms containing x to the left and all other terms to the right.
-2x=0+16
We simplify left and right side of the equation.
-2x=+16
We divide both sides of the equation by -2 to get x.
x=-8
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