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Simplifying
2a2 + 16 = 81
Reorder the terms:
16 + 2a2 = 81
Solving
16 + 2a2 = 81
Solving for variable 'a'.
Move all terms containing a to the left, all other terms to the right.
Add '-16' to each side of the equation.
16 + -16 + 2a2 = 81 + -16
Combine like terms: 16 + -16 = 0
0 + 2a2 = 81 + -16
2a2 = 81 + -16
Combine like terms: 81 + -16 = 65
2a2 = 65
Divide each side by '2'.
a2 = 32.5
Simplifying
a2 = 32.5
Take the square root of each side:
a = {-5.700877125, 5.700877125}
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