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Simplifying 28x2 + 5x + 8 = 0 Reorder the terms: 8 + 5x + 28x2 = 0 Solving 8 + 5x + 28x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 28 the coefficient of the squared term: Divide each side by '28'. 0.2857142857 + 0.1785714286x + x2 = 0 Move the constant term to the right: Add '-0.2857142857' to each side of the equation. 0.2857142857 + 0.1785714286x + -0.2857142857 + x2 = 0 + -0.2857142857 Reorder the terms: 0.2857142857 + -0.2857142857 + 0.1785714286x + x2 = 0 + -0.2857142857 Combine like terms: 0.2857142857 + -0.2857142857 = 0.0000000000 0.0000000000 + 0.1785714286x + x2 = 0 + -0.2857142857 0.1785714286x + x2 = 0 + -0.2857142857 Combine like terms: 0 + -0.2857142857 = -0.2857142857 0.1785714286x + x2 = -0.2857142857 The x term is 0.1785714286x. Take half its coefficient (0.0892857143). Square it (0.007971938778) and add it to both sides. Add '0.007971938778' to each side of the equation. 0.1785714286x + 0.007971938778 + x2 = -0.2857142857 + 0.007971938778 Reorder the terms: 0.007971938778 + 0.1785714286x + x2 = -0.2857142857 + 0.007971938778 Combine like terms: -0.2857142857 + 0.007971938778 = -0.277742346922 0.007971938778 + 0.1785714286x + x2 = -0.277742346922 Factor a perfect square on the left side: (x + 0.0892857143)(x + 0.0892857143) = -0.277742346922 Can't calculate square root of the right side. The solution to this equation could not be determined.
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