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Simplifying 8x2 + -18x + 15 = 0 Reorder the terms: 15 + -18x + 8x2 = 0 Solving 15 + -18x + 8x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 8 the coefficient of the squared term: Divide each side by '8'. 1.875 + -2.25x + x2 = 0 Move the constant term to the right: Add '-1.875' to each side of the equation. 1.875 + -2.25x + -1.875 + x2 = 0 + -1.875 Reorder the terms: 1.875 + -1.875 + -2.25x + x2 = 0 + -1.875 Combine like terms: 1.875 + -1.875 = 0.000 0.000 + -2.25x + x2 = 0 + -1.875 -2.25x + x2 = 0 + -1.875 Combine like terms: 0 + -1.875 = -1.875 -2.25x + x2 = -1.875 The x term is -2.25x. Take half its coefficient (-1.125). Square it (1.265625) and add it to both sides. Add '1.265625' to each side of the equation. -2.25x + 1.265625 + x2 = -1.875 + 1.265625 Reorder the terms: 1.265625 + -2.25x + x2 = -1.875 + 1.265625 Combine like terms: -1.875 + 1.265625 = -0.609375 1.265625 + -2.25x + x2 = -0.609375 Factor a perfect square on the left side: (x + -1.125)(x + -1.125) = -0.609375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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