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Simplifying
9z2 + -121 = 0
Reorder the terms:
-121 + 9z2 = 0
Solving
-121 + 9z2 = 0
Solving for variable 'z'.
Move all terms containing z to the left, all other terms to the right.
Add '121' to each side of the equation.
-121 + 121 + 9z2 = 0 + 121
Combine like terms: -121 + 121 = 0
0 + 9z2 = 0 + 121
9z2 = 0 + 121
Combine like terms: 0 + 121 = 121
9z2 = 121
Divide each side by '9'.
z2 = 13.44444444
Simplifying
z2 = 13.44444444
Take the square root of each side:
z = {-3.666666666, 3.666666666}
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