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Simplifying x2 + 8x + 16 = -7 Reorder the terms: 16 + 8x + x2 = -7 Solving 16 + 8x + x2 = -7 Solving for variable 'x'. Reorder the terms: 16 + 7 + 8x + x2 = -7 + 7 Combine like terms: 16 + 7 = 23 23 + 8x + x2 = -7 + 7 Combine like terms: -7 + 7 = 0 23 + 8x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-23' to each side of the equation. 23 + 8x + -23 + x2 = 0 + -23 Reorder the terms: 23 + -23 + 8x + x2 = 0 + -23 Combine like terms: 23 + -23 = 0 0 + 8x + x2 = 0 + -23 8x + x2 = 0 + -23 Combine like terms: 0 + -23 = -23 8x + x2 = -23 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 = -23 + 16 Reorder the terms: 16 + 8x + x2 = -23 + 16 Combine like terms: -23 + 16 = -7 16 + 8x + x2 = -7 Factor a perfect square on the left side: (x + 4)(x + 4) = -7 Can't calculate square root of the right side. The solution to this equation could not be determined.
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