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Simplifying x2 = 1x + -21 Reorder the terms: x2 = -21 + 1x Solving x2 = -21 + 1x Solving for variable 'x'. Reorder the terms: 21 + -1x + x2 = -21 + 1x + 21 + -1x Reorder the terms: 21 + -1x + x2 = -21 + 21 + 1x + -1x Combine like terms: -21 + 21 = 0 21 + -1x + x2 = 0 + 1x + -1x 21 + -1x + x2 = 1x + -1x Combine like terms: 1x + -1x = 0 21 + -1x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-21' to each side of the equation. 21 + -1x + -21 + x2 = 0 + -21 Reorder the terms: 21 + -21 + -1x + x2 = 0 + -21 Combine like terms: 21 + -21 = 0 0 + -1x + x2 = 0 + -21 -1x + x2 = 0 + -21 Combine like terms: 0 + -21 = -21 -1x + x2 = -21 The x term is -1x. Take half its coefficient (-0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. -1x + 0.25 + x2 = -21 + 0.25 Reorder the terms: 0.25 + -1x + x2 = -21 + 0.25 Combine like terms: -21 + 0.25 = -20.75 0.25 + -1x + x2 = -20.75 Factor a perfect square on the left side: (x + -0.5)(x + -0.5) = -20.75 Can't calculate square root of the right side. The solution to this equation could not be determined.
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