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Simplifying x2 + 16x + 243 = 0 Reorder the terms: 243 + 16x + x2 = 0 Solving 243 + 16x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-243' to each side of the equation. 243 + 16x + -243 + x2 = 0 + -243 Reorder the terms: 243 + -243 + 16x + x2 = 0 + -243 Combine like terms: 243 + -243 = 0 0 + 16x + x2 = 0 + -243 16x + x2 = 0 + -243 Combine like terms: 0 + -243 = -243 16x + x2 = -243 The x term is 16x. Take half its coefficient (8). Square it (64) and add it to both sides. Add '64' to each side of the equation. 16x + 64 + x2 = -243 + 64 Reorder the terms: 64 + 16x + x2 = -243 + 64 Combine like terms: -243 + 64 = -179 64 + 16x + x2 = -179 Factor a perfect square on the left side: (x + 8)(x + 8) = -179 Can't calculate square root of the right side. The solution to this equation could not be determined.
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