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Simplifying r2 + 6r + 55 = 0 Reorder the terms: 55 + 6r + r2 = 0 Solving 55 + 6r + r2 = 0 Solving for variable 'r'. Begin completing the square. Move the constant term to the right: Add '-55' to each side of the equation. 55 + 6r + -55 + r2 = 0 + -55 Reorder the terms: 55 + -55 + 6r + r2 = 0 + -55 Combine like terms: 55 + -55 = 0 0 + 6r + r2 = 0 + -55 6r + r2 = 0 + -55 Combine like terms: 0 + -55 = -55 6r + r2 = -55 The r term is 6r. Take half its coefficient (3). Square it (9) and add it to both sides. Add '9' to each side of the equation. 6r + 9 + r2 = -55 + 9 Reorder the terms: 9 + 6r + r2 = -55 + 9 Combine like terms: -55 + 9 = -46 9 + 6r + r2 = -46 Factor a perfect square on the left side: (r + 3)(r + 3) = -46 Can't calculate square root of the right side. The solution to this equation could not be determined.
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