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Simplifying x2 + 4.33x + 21 = 0 Reorder the terms: 21 + 4.33x + x2 = 0 Solving 21 + 4.33x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-21' to each side of the equation. 21 + 4.33x + -21 + x2 = 0 + -21 Reorder the terms: 21 + -21 + 4.33x + x2 = 0 + -21 Combine like terms: 21 + -21 = 0 0 + 4.33x + x2 = 0 + -21 4.33x + x2 = 0 + -21 Combine like terms: 0 + -21 = -21 4.33x + x2 = -21 The x term is 4.33x. Take half its coefficient (2.165). Square it (4.687225) and add it to both sides. Add '4.687225' to each side of the equation. 4.33x + 4.687225 + x2 = -21 + 4.687225 Reorder the terms: 4.687225 + 4.33x + x2 = -21 + 4.687225 Combine like terms: -21 + 4.687225 = -16.312775 4.687225 + 4.33x + x2 = -16.312775 Factor a perfect square on the left side: (x + 2.165)(x + 2.165) = -16.312775 Can't calculate square root of the right side. The solution to this equation could not be determined.
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