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Simplifying 0 = 9x2 + 5 + 3x + -15 + -11x2 Reorder the terms: 0 = 5 + -15 + 3x + 9x2 + -11x2 Combine like terms: 5 + -15 = -10 0 = -10 + 3x + 9x2 + -11x2 Combine like terms: 9x2 + -11x2 = -2x2 0 = -10 + 3x + -2x2 Solving 0 = -10 + 3x + -2x2 Solving for variable 'x'. Combine like terms: 0 + 10 = 10 10 + -3x + 2x2 = -10 + 3x + -2x2 + 10 + -3x + 2x2 Reorder the terms: 10 + -3x + 2x2 = -10 + 10 + 3x + -3x + -2x2 + 2x2 Combine like terms: -10 + 10 = 0 10 + -3x + 2x2 = 0 + 3x + -3x + -2x2 + 2x2 10 + -3x + 2x2 = 3x + -3x + -2x2 + 2x2 Combine like terms: 3x + -3x = 0 10 + -3x + 2x2 = 0 + -2x2 + 2x2 10 + -3x + 2x2 = -2x2 + 2x2 Combine like terms: -2x2 + 2x2 = 0 10 + -3x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 5 + -1.5x + x2 = 0 Move the constant term to the right: Add '-5' to each side of the equation. 5 + -1.5x + -5 + x2 = 0 + -5 Reorder the terms: 5 + -5 + -1.5x + x2 = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1.5x + x2 = 0 + -5 -1.5x + x2 = 0 + -5 Combine like terms: 0 + -5 = -5 -1.5x + x2 = -5 The x term is -1.5x. Take half its coefficient (-0.75). Square it (0.5625) and add it to both sides. Add '0.5625' to each side of the equation. -1.5x + 0.5625 + x2 = -5 + 0.5625 Reorder the terms: 0.5625 + -1.5x + x2 = -5 + 0.5625 Combine like terms: -5 + 0.5625 = -4.4375 0.5625 + -1.5x + x2 = -4.4375 Factor a perfect square on the left side: (x + -0.75)(x + -0.75) = -4.4375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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