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Simplifying 2x * 2x + 9x + 18 = 0 Reorder the terms for easier multiplication: 2 * 2x * x + 9x + 18 = 0 Multiply 2 * 2 4x * x + 9x + 18 = 0 Multiply x * x 4x2 + 9x + 18 = 0 Reorder the terms: 18 + 9x + 4x2 = 0 Solving 18 + 9x + 4x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. 4.5 + 2.25x + x2 = 0 Move the constant term to the right: Add '-4.5' to each side of the equation. 4.5 + 2.25x + -4.5 + x2 = 0 + -4.5 Reorder the terms: 4.5 + -4.5 + 2.25x + x2 = 0 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + 2.25x + x2 = 0 + -4.5 2.25x + x2 = 0 + -4.5 Combine like terms: 0 + -4.5 = -4.5 2.25x + x2 = -4.5 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 = -4.5 + 1.265625 Reorder the terms: 1.265625 + 2.25x + x2 = -4.5 + 1.265625 Combine like terms: -4.5 + 1.265625 = -3.234375 1.265625 + 2.25x + x2 = -3.234375 Factor a perfect square on the left side: (x + 1.125)(x + 1.125) = -3.234375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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