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Simplifying 7x2 + -0.4x + 0.04 = 0 Reorder the terms: 0.04 + -0.4x + 7x2 = 0 Solving 0.04 + -0.4x + 7x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 7 the coefficient of the squared term: Divide each side by '7'. 0.005714285714 + -0.05714285714x + x2 = 0 Move the constant term to the right: Add '-0.005714285714' to each side of the equation. 0.005714285714 + -0.05714285714x + -0.005714285714 + x2 = 0 + -0.005714285714 Reorder the terms: 0.005714285714 + -0.005714285714 + -0.05714285714x + x2 = 0 + -0.005714285714 Combine like terms: 0.005714285714 + -0.005714285714 = 0.000000000000 0.000000000000 + -0.05714285714x + x2 = 0 + -0.005714285714 -0.05714285714x + x2 = 0 + -0.005714285714 Combine like terms: 0 + -0.005714285714 = -0.005714285714 -0.05714285714x + x2 = -0.005714285714 The x term is -0.05714285714x. Take half its coefficient (-0.02857142857). Square it (0.0008163265305) and add it to both sides. Add '0.0008163265305' to each side of the equation. -0.05714285714x + 0.0008163265305 + x2 = -0.005714285714 + 0.0008163265305 Reorder the terms: 0.0008163265305 + -0.05714285714x + x2 = -0.005714285714 + 0.0008163265305 Combine like terms: -0.005714285714 + 0.0008163265305 = -0.0048979591835 0.0008163265305 + -0.05714285714x + x2 = -0.0048979591835 Factor a perfect square on the left side: (x + -0.02857142857)(x + -0.02857142857) = -0.0048979591835 Can't calculate square root of the right side. The solution to this equation could not be determined.
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