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Simplifying x + -4 = x2 + 16 Reorder the terms: -4 + x = x2 + 16 Reorder the terms: -4 + x = 16 + x2 Solving -4 + x = 16 + x2 Solving for variable 'x'. Reorder the terms: -4 + -16 + x + -1x2 = 16 + x2 + -16 + -1x2 Combine like terms: -4 + -16 = -20 -20 + x + -1x2 = 16 + x2 + -16 + -1x2 Reorder the terms: -20 + x + -1x2 = 16 + -16 + x2 + -1x2 Combine like terms: 16 + -16 = 0 -20 + x + -1x2 = 0 + x2 + -1x2 -20 + x + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -20 + x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 20 + -1x + x2 = 0 Move the constant term to the right: Add '-20' to each side of the equation. 20 + -1x + -20 + x2 = 0 + -20 Reorder the terms: 20 + -20 + -1x + x2 = 0 + -20 Combine like terms: 20 + -20 = 0 0 + -1x + x2 = 0 + -20 -1x + x2 = 0 + -20 Combine like terms: 0 + -20 = -20 -1x + x2 = -20 The x term is x. 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 = -20 + 0.25 Reorder the terms: 0.25 + -1x + x2 = -20 + 0.25 Combine like terms: -20 + 0.25 = -19.75 0.25 + -1x + x2 = -19.75 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = -19.75 Can't calculate square root of the right side. The solution to this equation could not be determined.
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