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Simplifying x2 + 6x + 9 = -15 Reorder the terms: 9 + 6x + x2 = -15 Solving 9 + 6x + x2 = -15 Solving for variable 'x'. Reorder the terms: 9 + 15 + 6x + x2 = -15 + 15 Combine like terms: 9 + 15 = 24 24 + 6x + x2 = -15 + 15 Combine like terms: -15 + 15 = 0 24 + 6x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-24' to each side of the equation. 24 + 6x + -24 + x2 = 0 + -24 Reorder the terms: 24 + -24 + 6x + x2 = 0 + -24 Combine like terms: 24 + -24 = 0 0 + 6x + x2 = 0 + -24 6x + x2 = 0 + -24 Combine like terms: 0 + -24 = -24 6x + x2 = -24 The x term is 6x. Take half its coefficient (3). Square it (9) and add it to both sides. Add '9' to each side of the equation. 6x + 9 + x2 = -24 + 9 Reorder the terms: 9 + 6x + x2 = -24 + 9 Combine like terms: -24 + 9 = -15 9 + 6x + x2 = -15 Factor a perfect square on the left side: (x + 3)(x + 3) = -15 Can't calculate square root of the right side. The solution to this equation could not be determined.
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