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Simplifying
x2 + 2 + 1 = 9
Reorder the terms:
2 + 1 + x2 = 9
Combine like terms: 2 + 1 = 3
3 + x2 = 9
Solving
3 + x2 = 9
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 + x2 = 9 + -3
Combine like terms: 3 + -3 = 0
0 + x2 = 9 + -3
x2 = 9 + -3
Combine like terms: 9 + -3 = 6
x2 = 6
Simplifying
x2 = 6
Take the square root of each side:
x = {-2.449489743, 2.449489743}
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