z^2-10=9

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Solution for z^2-10=9 equation:


Simplifying
z2 + -10 = 9

Reorder the terms:
-10 + z2 = 9

Solving
-10 + z2 = 9

Solving for variable 'z'.

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

Add '10' to each side of the equation.
-10 + 10 + z2 = 9 + 10

Combine like terms: -10 + 10 = 0
0 + z2 = 9 + 10
z2 = 9 + 10

Combine like terms: 9 + 10 = 19
z2 = 19

Simplifying
z2 = 19

Take the square root of each side:
z = {-4.358898944, 4.358898944}

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