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Simplifying 7x2 + -1x + 2 + 3x2 + -4x = 0 Reorder the terms: 2 + -1x + -4x + 7x2 + 3x2 = 0 Combine like terms: -1x + -4x = -5x 2 + -5x + 7x2 + 3x2 = 0 Combine like terms: 7x2 + 3x2 = 10x2 2 + -5x + 10x2 = 0 Solving 2 + -5x + 10x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 10 the coefficient of the squared term: Divide each side by '10'. 0.2 + -0.5x + x2 = 0.0 Move the constant term to the right: Add '-0.2' to each side of the equation. 0.2 + -0.5x + -0.2 + x2 = 0.0 + -0.2 Reorder the terms: 0.2 + -0.2 + -0.5x + x2 = 0.0 + -0.2 Combine like terms: 0.2 + -0.2 = 0.0 0.0 + -0.5x + x2 = 0.0 + -0.2 -0.5x + x2 = 0.0 + -0.2 Combine like terms: 0.0 + -0.2 = -0.2 -0.5x + x2 = -0.2 The x term is -0.5x. Take half its coefficient (-0.25). Square it (0.0625) and add it to both sides. Add '0.0625' to each side of the equation. -0.5x + 0.0625 + x2 = -0.2 + 0.0625 Reorder the terms: 0.0625 + -0.5x + x2 = -0.2 + 0.0625 Combine like terms: -0.2 + 0.0625 = -0.1375 0.0625 + -0.5x + x2 = -0.1375 Factor a perfect square on the left side: (x + -0.25)(x + -0.25) = -0.1375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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