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Simplifying
-2z(z) = 0
Multiply z * z
-2z2 = 0
Solving
-2z2 = 0
Solving for variable 'z'.
Move all terms containing z to the left, all other terms to the right.
Divide each side by '-2'.
z2 = 0
Simplifying
z2 = 0
Take the square root of each side:
z = {0}
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