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Simplifying 5x2 + 18x + 45 = 0 Reorder the terms: 45 + 18x + 5x2 = 0 Solving 45 + 18x + 5x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. 9 + 3.6x + x2 = 0 Move the constant term to the right: Add '-9' to each side of the equation. 9 + 3.6x + -9 + x2 = 0 + -9 Reorder the terms: 9 + -9 + 3.6x + x2 = 0 + -9 Combine like terms: 9 + -9 = 0 0 + 3.6x + x2 = 0 + -9 3.6x + x2 = 0 + -9 Combine like terms: 0 + -9 = -9 3.6x + x2 = -9 The x term is 3.6x. Take half its coefficient (1.8). Square it (3.24) and add it to both sides. Add '3.24' to each side of the equation. 3.6x + 3.24 + x2 = -9 + 3.24 Reorder the terms: 3.24 + 3.6x + x2 = -9 + 3.24 Combine like terms: -9 + 3.24 = -5.76 3.24 + 3.6x + x2 = -5.76 Factor a perfect square on the left side: (x + 1.8)(x + 1.8) = -5.76 Can't calculate square root of the right side. The solution to this equation could not be determined.
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