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Simplifying 9x2 + 4x + 18 = 4 Reorder the terms: 18 + 4x + 9x2 = 4 Solving 18 + 4x + 9x2 = 4 Solving for variable 'x'. Reorder the terms: 18 + -4 + 4x + 9x2 = 4 + -4 Combine like terms: 18 + -4 = 14 14 + 4x + 9x2 = 4 + -4 Combine like terms: 4 + -4 = 0 14 + 4x + 9x2 = 0 Begin completing the square. Divide all terms by 9 the coefficient of the squared term: Divide each side by '9'. 1.555555556 + 0.4444444444x + x2 = 0 Move the constant term to the right: Add '-1.555555556' to each side of the equation. 1.555555556 + 0.4444444444x + -1.555555556 + x2 = 0 + -1.555555556 Reorder the terms: 1.555555556 + -1.555555556 + 0.4444444444x + x2 = 0 + -1.555555556 Combine like terms: 1.555555556 + -1.555555556 = 0.000000000 0.000000000 + 0.4444444444x + x2 = 0 + -1.555555556 0.4444444444x + x2 = 0 + -1.555555556 Combine like terms: 0 + -1.555555556 = -1.555555556 0.4444444444x + x2 = -1.555555556 The x term is 0.4444444444x. Take half its coefficient (0.2222222222). Square it (0.04938271604) and add it to both sides. Add '0.04938271604' to each side of the equation. 0.4444444444x + 0.04938271604 + x2 = -1.555555556 + 0.04938271604 Reorder the terms: 0.04938271604 + 0.4444444444x + x2 = -1.555555556 + 0.04938271604 Combine like terms: -1.555555556 + 0.04938271604 = -1.50617283996 0.04938271604 + 0.4444444444x + x2 = -1.50617283996 Factor a perfect square on the left side: (x + 0.2222222222)(x + 0.2222222222) = -1.50617283996 Can't calculate square root of the right side. The solution to this equation could not be determined.
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