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Simplifying
3 + 81x2 = 28
Solving
3 + 81x2 = 28
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-3' to each side of the equation.
3 + -3 + 81x2 = 28 + -3
Combine like terms: 3 + -3 = 0
0 + 81x2 = 28 + -3
81x2 = 28 + -3
Combine like terms: 28 + -3 = 25
81x2 = 25
Divide each side by '81'.
x2 = 0.3086419753
Simplifying
x2 = 0.3086419753
Take the square root of each side:
x = {-0.555555556, 0.555555556}
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