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Simplifying
3z2 + -18 = 3
Reorder the terms:
-18 + 3z2 = 3
Solving
-18 + 3z2 = 3
Solving for variable 'z'.
Move all terms containing z to the left, all other terms to the right.
Add '18' to each side of the equation.
-18 + 18 + 3z2 = 3 + 18
Combine like terms: -18 + 18 = 0
0 + 3z2 = 3 + 18
3z2 = 3 + 18
Combine like terms: 3 + 18 = 21
3z2 = 21
Divide each side by '3'.
z2 = 7
Simplifying
z2 = 7
Take the square root of each side:
z = {-2.645751311, 2.645751311}
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