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Simplifying (5x2 + -4x + -1) + -1(-4x2 + -4) = 0 Reorder the terms: (-1 + -4x + 5x2) + -1(-4x2 + -4) = 0 Remove parenthesis around (-1 + -4x + 5x2) -1 + -4x + 5x2 + -1(-4x2 + -4) = 0 Reorder the terms: -1 + -4x + 5x2 + -1(-4 + -4x2) = 0 -1 + -4x + 5x2 + (-4 * -1 + -4x2 * -1) = 0 -1 + -4x + 5x2 + (4 + 4x2) = 0 Reorder the terms: -1 + 4 + -4x + 5x2 + 4x2 = 0 Combine like terms: -1 + 4 = 3 3 + -4x + 5x2 + 4x2 = 0 Combine like terms: 5x2 + 4x2 = 9x2 3 + -4x + 9x2 = 0 Solving 3 + -4x + 9x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 9 the coefficient of the squared term: Divide each side by '9'. 0.3333333333 + -0.4444444444x + x2 = 0 Move the constant term to the right: Add '-0.3333333333' to each side of the equation. 0.3333333333 + -0.4444444444x + -0.3333333333 + x2 = 0 + -0.3333333333 Reorder the terms: 0.3333333333 + -0.3333333333 + -0.4444444444x + x2 = 0 + -0.3333333333 Combine like terms: 0.3333333333 + -0.3333333333 = 0.0000000000 0.0000000000 + -0.4444444444x + x2 = 0 + -0.3333333333 -0.4444444444x + x2 = 0 + -0.3333333333 Combine like terms: 0 + -0.3333333333 = -0.3333333333 -0.4444444444x + x2 = -0.3333333333 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 = -0.3333333333 + 0.04938271604 Reorder the terms: 0.04938271604 + -0.4444444444x + x2 = -0.3333333333 + 0.04938271604 Combine like terms: -0.3333333333 + 0.04938271604 = -0.28395061726 0.04938271604 + -0.4444444444x + x2 = -0.28395061726 Factor a perfect square on the left side: (x + -0.2222222222)(x + -0.2222222222) = -0.28395061726 Can't calculate square root of the right side. The solution to this equation could not be determined.
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