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Simplifying
4x2 + 4 = 396
Reorder the terms:
4 + 4x2 = 396
Solving
4 + 4x2 = 396
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-4' to each side of the equation.
4 + -4 + 4x2 = 396 + -4
Combine like terms: 4 + -4 = 0
0 + 4x2 = 396 + -4
4x2 = 396 + -4
Combine like terms: 396 + -4 = 392
4x2 = 392
Divide each side by '4'.
x2 = 98
Simplifying
x2 = 98
Take the square root of each side:
x = {-9.899494937, 9.899494937}
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