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Simplifying 10x2 + 5x + 18 = 1 Reorder the terms: 18 + 5x + 10x2 = 1 Solving 18 + 5x + 10x2 = 1 Solving for variable 'x'. Reorder the terms: 18 + -1 + 5x + 10x2 = 1 + -1 Combine like terms: 18 + -1 = 17 17 + 5x + 10x2 = 1 + -1 Combine like terms: 1 + -1 = 0 17 + 5x + 10x2 = 0 Begin completing the square. Divide all terms by 10 the coefficient of the squared term: Divide each side by '10'. 1.7 + 0.5x + x2 = 0 Move the constant term to the right: Add '-1.7' to each side of the equation. 1.7 + 0.5x + -1.7 + x2 = 0 + -1.7 Reorder the terms: 1.7 + -1.7 + 0.5x + x2 = 0 + -1.7 Combine like terms: 1.7 + -1.7 = 0.0 0.0 + 0.5x + x2 = 0 + -1.7 0.5x + x2 = 0 + -1.7 Combine like terms: 0 + -1.7 = -1.7 0.5x + x2 = -1.7 The x term is 0.5x. Take half its coefficient (0.25). Square it (0.0625) and add it to both sides. Add '0.0625' to each side of the equation. 0.5x + 0.0625 + x2 = -1.7 + 0.0625 Reorder the terms: 0.0625 + 0.5x + x2 = -1.7 + 0.0625 Combine like terms: -1.7 + 0.0625 = -1.6375 0.0625 + 0.5x + x2 = -1.6375 Factor a perfect square on the left side: (x + 0.25)(x + 0.25) = -1.6375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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