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Simplifying 5x2 + -11x + 18 = 0 Reorder the terms: 18 + -11x + 5x2 = 0 Solving 18 + -11x + 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'. 3.6 + -2.2x + x2 = 0 Move the constant term to the right: Add '-3.6' to each side of the equation. 3.6 + -2.2x + -3.6 + x2 = 0 + -3.6 Reorder the terms: 3.6 + -3.6 + -2.2x + x2 = 0 + -3.6 Combine like terms: 3.6 + -3.6 = 0.0 0.0 + -2.2x + x2 = 0 + -3.6 -2.2x + x2 = 0 + -3.6 Combine like terms: 0 + -3.6 = -3.6 -2.2x + x2 = -3.6 The x term is -2.2x. Take half its coefficient (-1.1). Square it (1.21) and add it to both sides. Add '1.21' to each side of the equation. -2.2x + 1.21 + x2 = -3.6 + 1.21 Reorder the terms: 1.21 + -2.2x + x2 = -3.6 + 1.21 Combine like terms: -3.6 + 1.21 = -2.39 1.21 + -2.2x + x2 = -2.39 Factor a perfect square on the left side: (x + -1.1)(x + -1.1) = -2.39 Can't calculate square root of the right side. The solution to this equation could not be determined.
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