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Simplifying
3x2 + 81 = 96
Reorder the terms:
81 + 3x2 = 96
Solving
81 + 3x2 = 96
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-81' to each side of the equation.
81 + -81 + 3x2 = 96 + -81
Combine like terms: 81 + -81 = 0
0 + 3x2 = 96 + -81
3x2 = 96 + -81
Combine like terms: 96 + -81 = 15
3x2 = 15
Divide each side by '3'.
x2 = 5
Simplifying
x2 = 5
Take the square root of each side:
x = {-2.236067978, 2.236067978}
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