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Simplifying (x + 2)(x + 2) + 18 = 0 Reorder the terms: (2 + x)(x + 2) + 18 = 0 Reorder the terms: (2 + x)(2 + x) + 18 = 0 Multiply (2 + x) * (2 + x) (2(2 + x) + x(2 + x)) + 18 = 0 ((2 * 2 + x * 2) + x(2 + x)) + 18 = 0 ((4 + 2x) + x(2 + x)) + 18 = 0 (4 + 2x + (2 * x + x * x)) + 18 = 0 (4 + 2x + (2x + x2)) + 18 = 0 Combine like terms: 2x + 2x = 4x (4 + 4x + x2) + 18 = 0 Reorder the terms: 4 + 18 + 4x + x2 = 0 Combine like terms: 4 + 18 = 22 22 + 4x + x2 = 0 Solving 22 + 4x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-22' to each side of the equation. 22 + 4x + -22 + x2 = 0 + -22 Reorder the terms: 22 + -22 + 4x + x2 = 0 + -22 Combine like terms: 22 + -22 = 0 0 + 4x + x2 = 0 + -22 4x + x2 = 0 + -22 Combine like terms: 0 + -22 = -22 4x + x2 = -22 The x term is 4x. Take half its coefficient (2). Square it (4) and add it to both sides. Add '4' to each side of the equation. 4x + 4 + x2 = -22 + 4 Reorder the terms: 4 + 4x + x2 = -22 + 4 Combine like terms: -22 + 4 = -18 4 + 4x + x2 = -18 Factor a perfect square on the left side: (x + 2)(x + 2) = -18 Can't calculate square root of the right side. The solution to this equation could not be determined.
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