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Simplifying (x2 + 4) + -1(x + -4) = 0 Reorder the terms: (4 + x2) + -1(x + -4) = 0 Remove parenthesis around (4 + x2) 4 + x2 + -1(x + -4) = 0 Reorder the terms: 4 + x2 + -1(-4 + x) = 0 4 + x2 + (-4 * -1 + x * -1) = 0 4 + x2 + (4 + -1x) = 0 Reorder the terms: 4 + 4 + -1x + x2 = 0 Combine like terms: 4 + 4 = 8 8 + -1x + x2 = 0 Solving 8 + -1x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-8' to each side of the equation. 8 + -1x + -8 + x2 = 0 + -8 Reorder the terms: 8 + -8 + -1x + x2 = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1x + x2 = 0 + -8 -1x + x2 = 0 + -8 Combine like terms: 0 + -8 = -8 -1x + x2 = -8 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 = -8 + 0.25 Reorder the terms: 0.25 + -1x + x2 = -8 + 0.25 Combine like terms: -8 + 0.25 = -7.75 0.25 + -1x + x2 = -7.75 Factor a perfect square on the left side: (x + -0.5)(x + -0.5) = -7.75 Can't calculate square root of the right side. The solution to this equation could not be determined.
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