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Simplifying 10x2 + 3x + 18 = 0 Reorder the terms: 18 + 3x + 10x2 = 0 Solving 18 + 3x + 10x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 10 the coefficient of the squared term: Divide each side by '10'. 1.8 + 0.3x + x2 = 0 Move the constant term to the right: Add '-1.8' to each side of the equation. 1.8 + 0.3x + -1.8 + x2 = 0 + -1.8 Reorder the terms: 1.8 + -1.8 + 0.3x + x2 = 0 + -1.8 Combine like terms: 1.8 + -1.8 = 0.0 0.0 + 0.3x + x2 = 0 + -1.8 0.3x + x2 = 0 + -1.8 Combine like terms: 0 + -1.8 = -1.8 0.3x + x2 = -1.8 The x term is 0.3x. Take half its coefficient (0.15). Square it (0.0225) and add it to both sides. Add '0.0225' to each side of the equation. 0.3x + 0.0225 + x2 = -1.8 + 0.0225 Reorder the terms: 0.0225 + 0.3x + x2 = -1.8 + 0.0225 Combine like terms: -1.8 + 0.0225 = -1.7775 0.0225 + 0.3x + x2 = -1.7775 Factor a perfect square on the left side: (x + 0.15)(x + 0.15) = -1.7775 Can't calculate square root of the right side. The solution to this equation could not be determined.
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