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Simplifying
8x2 + -4 = 0
Reorder the terms:
-4 + 8x2 = 0
Solving
-4 + 8x2 = 0
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 + 8x2 = 0 + 4
Combine like terms: -4 + 4 = 0
0 + 8x2 = 0 + 4
8x2 = 0 + 4
Combine like terms: 0 + 4 = 4
8x2 = 4
Divide each side by '8'.
x2 = 0.5
Simplifying
x2 = 0.5
Take the square root of each side:
x = {-0.707106781, 0.707106781}
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