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Simplifying
3z2 + -12 = 0
Reorder the terms:
-12 + 3z2 = 0
Solving
-12 + 3z2 = 0
Solving for variable 'z'.
Move all terms containing z to the left, all other terms to the right.
Add '12' to each side of the equation.
-12 + 12 + 3z2 = 0 + 12
Combine like terms: -12 + 12 = 0
0 + 3z2 = 0 + 12
3z2 = 0 + 12
Combine like terms: 0 + 12 = 12
3z2 = 12
Divide each side by '3'.
z2 = 4
Simplifying
z2 = 4
Take the square root of each side:
z = {-2, 2}
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