z^2+4=9

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Solution for z^2+4=9 equation: 


Simplifying
z2 + 4 = 9

Reorder the terms:
4 + z2 = 9

Solving
4 + z2 = 9

Solving for variable 'z'.

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

Add '-4' to each side of the equation.
4 + -4 + z2 = 9 + -4

Combine like terms: 4 + -4 = 0
0 + z2 = 9 + -4
z2 = 9 + -4

Combine like terms: 9 + -4 = 5
z2 = 5

Simplifying
z2 = 5

Take the square root of each side:
z = {-2.236067978, 2.236067978}

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