81+a^2=100

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Solution for 81+a^2=100 equation: 


Simplifying
81 + a2 = 100

Solving
81 + a2 = 100

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 = 100 + -81

Combine like terms: 81 + -81 = 0
0 + a2 = 100 + -81
a2 = 100 + -81

Combine like terms: 100 + -81 = 19
a2 = 19

Simplifying
a2 = 19

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

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