z^2a-b=4

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Solution for z^2a-b=4 equation: 


Simplifying
z2a + -1b = 4

Solving
az2 + -1b = 4

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add 'b' to each side of the equation.
az2 + -1b + b = 4 + b

Combine like terms: -1b + b = 0
az2 + 0 = 4 + b
az2 = 4 + b

Divide each side by 'z2'.
a = 4z-2 + bz-2

Simplifying
a = 4z-2 + bz-2

Reorder the terms:
a = bz-2 + 4z-2

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