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Simplifying x(x + 8) + 18 = 0 Reorder the terms: x(8 + x) + 18 = 0 (8 * x + x * x) + 18 = 0 (8x + x2) + 18 = 0 Reorder the terms: 18 + 8x + x2 = 0 Solving 18 + 8x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-18' to each side of the equation. 18 + 8x + -18 + x2 = 0 + -18 Reorder the terms: 18 + -18 + 8x + x2 = 0 + -18 Combine like terms: 18 + -18 = 0 0 + 8x + x2 = 0 + -18 8x + x2 = 0 + -18 Combine like terms: 0 + -18 = -18 8x + x2 = -18 The x term is 8x. Take half its coefficient (4). Square it (16) and add it to both sides. Add '16' to each side of the equation. 8x + 16 + x2 = -18 + 16 Reorder the terms: 16 + 8x + x2 = -18 + 16 Combine like terms: -18 + 16 = -2 16 + 8x + x2 = -2 Factor a perfect square on the left side: (x + 4)(x + 4) = -2 Can't calculate square root of the right side. The solution to this equation could not be determined.
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