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Simplifying
4x2 + 12 = 256
Reorder the terms:
12 + 4x2 = 256
Solving
12 + 4x2 = 256
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-12' to each side of the equation.
12 + -12 + 4x2 = 256 + -12
Combine like terms: 12 + -12 = 0
0 + 4x2 = 256 + -12
4x2 = 256 + -12
Combine like terms: 256 + -12 = 244
4x2 = 244
Divide each side by '4'.
x2 = 61
Simplifying
x2 = 61
Take the square root of each side:
x = {-7.810249676, 7.810249676}
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