z^2-10=15

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Solution for z^2-10=15 equation: 


Simplifying
z2 + -10 = 15

Reorder the terms:
-10 + z2 = 15

Solving
-10 + z2 = 15

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 = 15 + 10

Combine like terms: -10 + 10 = 0
0 + z2 = 15 + 10
z2 = 15 + 10

Combine like terms: 15 + 10 = 25
z2 = 25

Simplifying
z2 = 25

Take the square root of each side:
z = {-5, 5}

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