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Simplifying 5m2 + 8m + 15 = 0 Reorder the terms: 15 + 8m + 5m2 = 0 Solving 15 + 8m + 5m2 = 0 Solving for variable 'm'. Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. 3 + 1.6m + m2 = 0 Move the constant term to the right: Add '-3' to each side of the equation. 3 + 1.6m + -3 + m2 = 0 + -3 Reorder the terms: 3 + -3 + 1.6m + m2 = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 1.6m + m2 = 0 + -3 1.6m + m2 = 0 + -3 Combine like terms: 0 + -3 = -3 1.6m + m2 = -3 The m term is 1.6m. Take half its coefficient (0.8). Square it (0.64) and add it to both sides. Add '0.64' to each side of the equation. 1.6m + 0.64 + m2 = -3 + 0.64 Reorder the terms: 0.64 + 1.6m + m2 = -3 + 0.64 Combine like terms: -3 + 0.64 = -2.36 0.64 + 1.6m + m2 = -2.36 Factor a perfect square on the left side: (m + 0.8)(m + 0.8) = -2.36 Can't calculate square root of the right side. The solution to this equation could not be determined.
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