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(3z+12)2=0
We simplify the equation to the form, which is simple to understand
(3z+12)2=0
Reorder the terms in parentheses
(+6z+24)=0
Remove unnecessary parentheses
+6z+24=0
We move all terms containing z to the left and all other terms to the right.
+6z=0-24
We simplify left and right side of the equation.
+6z=-24
We divide both sides of the equation by 6 to get z.
z=-4
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