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Simplifying x2 + 3x + 4x2 + 5 + -6x = 0 Reorder the terms: 5 + 3x + -6x + x2 + 4x2 = 0 Combine like terms: 3x + -6x = -3x 5 + -3x + x2 + 4x2 = 0 Combine like terms: x2 + 4x2 = 5x2 5 + -3x + 5x2 = 0 Solving 5 + -3x + 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'. 1 + -0.6x + x2 = 0 Move the constant term to the right: Add '-1' to each side of the equation. 1 + -0.6x + -1 + x2 = 0 + -1 Reorder the terms: 1 + -1 + -0.6x + x2 = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -0.6x + x2 = 0 + -1 -0.6x + x2 = 0 + -1 Combine like terms: 0 + -1 = -1 -0.6x + x2 = -1 The x term is -0.6x. Take half its coefficient (-0.3). Square it (0.09) and add it to both sides. Add '0.09' to each side of the equation. -0.6x + 0.09 + x2 = -1 + 0.09 Reorder the terms: 0.09 + -0.6x + x2 = -1 + 0.09 Combine like terms: -1 + 0.09 = -0.91 0.09 + -0.6x + x2 = -0.91 Factor a perfect square on the left side: (x + -0.3)(x + -0.3) = -0.91 Can't calculate square root of the right side. The solution to this equation could not be determined.
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