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Simplifying 28x2 + -16x + 4 = 0 Reorder the terms: 4 + -16x + 28x2 = 0 Solving 4 + -16x + 28x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '4'. 4(1 + -4x + 7x2) = 0 Ignore the factor 4.Subproblem 1
Set the factor '(1 + -4x + 7x2)' equal to zero and attempt to solve: Simplifying 1 + -4x + 7x2 = 0 Solving 1 + -4x + 7x2 = 0 Begin completing the square. Divide all terms by 7 the coefficient of the squared term: Divide each side by '7'. 0.1428571429 + -0.5714285714x + x2 = 0 Move the constant term to the right: Add '-0.1428571429' to each side of the equation. 0.1428571429 + -0.5714285714x + -0.1428571429 + x2 = 0 + -0.1428571429 Reorder the terms: 0.1428571429 + -0.1428571429 + -0.5714285714x + x2 = 0 + -0.1428571429 Combine like terms: 0.1428571429 + -0.1428571429 = 0.0000000000 0.0000000000 + -0.5714285714x + x2 = 0 + -0.1428571429 -0.5714285714x + x2 = 0 + -0.1428571429 Combine like terms: 0 + -0.1428571429 = -0.1428571429 -0.5714285714x + x2 = -0.1428571429 The x term is -0.5714285714x. Take half its coefficient (-0.2857142857). Square it (0.08163265305) and add it to both sides. Add '0.08163265305' to each side of the equation. -0.5714285714x + 0.08163265305 + x2 = -0.1428571429 + 0.08163265305 Reorder the terms: 0.08163265305 + -0.5714285714x + x2 = -0.1428571429 + 0.08163265305 Combine like terms: -0.1428571429 + 0.08163265305 = -0.06122448985 0.08163265305 + -0.5714285714x + x2 = -0.06122448985 Factor a perfect square on the left side: (x + -0.2857142857)(x + -0.2857142857) = -0.06122448985 Can't calculate square root of the right side. The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.
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