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Simplifying
0 = 81z2 + -49
Reorder the terms:
0 = -49 + 81z2
Solving
0 = -49 + 81z2
Solving for variable 'z'.
Move all terms containing z to the left, all other terms to the right.
Add '-81z2' to each side of the equation.
0 + -81z2 = -49 + 81z2 + -81z2
Remove the zero:
-81z2 = -49 + 81z2 + -81z2
Combine like terms: 81z2 + -81z2 = 0
-81z2 = -49 + 0
-81z2 = -49
Divide each side by '-81'.
z2 = 0.6049382716
Simplifying
z2 = 0.6049382716
Take the square root of each side:
z = {-0.777777778, 0.777777778}
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