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Simplifying
3x2 + 0 = 9
Reorder the terms:
0 + 3x2 = 9
Remove the zero:
3x2 = 9
Solving
3x2 = 9
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Divide each side by '3'.
x2 = 3
Simplifying
x2 = 3
Take the square root of each side:
x = {-1.732050808, 1.732050808}
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