a^2+81=225

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Solution for a^2+81=225 equation: 


Simplifying
a2 + 81 = 225

Reorder the terms:
81 + a2 = 225

Solving
81 + a2 = 225

Solving for variable 'a'.

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

Add '-81' to each side of the equation.
81 + -81 + a2 = 225 + -81

Combine like terms: 81 + -81 = 0
0 + a2 = 225 + -81
a2 = 225 + -81

Combine like terms: 225 + -81 = 144
a2 = 144

Simplifying
a2 = 144

Take the square root of each side:
a = {-12, 12}

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