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Simplifying
4x2 + 56 = 168
Reorder the terms:
56 + 4x2 = 168
Solving
56 + 4x2 = 168
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-56' to each side of the equation.
56 + -56 + 4x2 = 168 + -56
Combine like terms: 56 + -56 = 0
0 + 4x2 = 168 + -56
4x2 = 168 + -56
Combine like terms: 168 + -56 = 112
4x2 = 112
Divide each side by '4'.
x2 = 28
Simplifying
x2 = 28
Take the square root of each side:
x = {-5.291502622, 5.291502622}
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