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Simplifying x4 + 7x2 + 16 = 0 Reorder the terms: 16 + 7x2 + x4 = 0 Solving 16 + 7x2 + x4 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-16' to each side of the equation. 16 + 7x2 + -16 + x4 = 0 + -16 Reorder the terms: 16 + -16 + 7x2 + x4 = 0 + -16 Combine like terms: 16 + -16 = 0 0 + 7x2 + x4 = 0 + -16 7x2 + x4 = 0 + -16 Combine like terms: 0 + -16 = -16 7x2 + x4 = -16 The x term is 7x2. Take half its coefficient (3.5). Square it (12.25) and add it to both sides. Add '12.25' to each side of the equation. 7x2 + 12.25 + x4 = -16 + 12.25 Reorder the terms: 12.25 + 7x2 + x4 = -16 + 12.25 Combine like terms: -16 + 12.25 = -3.75 12.25 + 7x2 + x4 = -3.75 Factor a perfect square on the left side: (x2 + 3.5)(x2 + 3.5) = -3.75 Can't calculate square root of the right side. The solution to this equation could not be determined.
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