a^2+64=81

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Solution for a^2+64=81 equation: 


Simplifying
a2 + 64 = 81

Reorder the terms:
64 + a2 = 81

Solving
64 + a2 = 81

Solving for variable 'a'.

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

Add '-64' to each side of the equation.
64 + -64 + a2 = 81 + -64

Combine like terms: 64 + -64 = 0
0 + a2 = 81 + -64
a2 = 81 + -64

Combine like terms: 81 + -64 = 17
a2 = 17

Simplifying
a2 = 17

Take the square root of each side:
a = {-4.123105626, 4.123105626}

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