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Simplifying 6x2 + 9x + 20 = 0 Reorder the terms: 20 + 9x + 6x2 = 0 Solving 20 + 9x + 6x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 6 the coefficient of the squared term: Divide each side by '6'. 3.333333333 + 1.5x + x2 = 0 Move the constant term to the right: Add '-3.333333333' to each side of the equation. 3.333333333 + 1.5x + -3.333333333 + x2 = 0 + -3.333333333 Reorder the terms: 3.333333333 + -3.333333333 + 1.5x + x2 = 0 + -3.333333333 Combine like terms: 3.333333333 + -3.333333333 = 0.000000000 0.000000000 + 1.5x + x2 = 0 + -3.333333333 1.5x + x2 = 0 + -3.333333333 Combine like terms: 0 + -3.333333333 = -3.333333333 1.5x + x2 = -3.333333333 The x term is 1.5x. Take half its coefficient (0.75). Square it (0.5625) and add it to both sides. Add '0.5625' to each side of the equation. 1.5x + 0.5625 + x2 = -3.333333333 + 0.5625 Reorder the terms: 0.5625 + 1.5x + x2 = -3.333333333 + 0.5625 Combine like terms: -3.333333333 + 0.5625 = -2.770833333 0.5625 + 1.5x + x2 = -2.770833333 Factor a perfect square on the left side: (x + 0.75)(x + 0.75) = -2.770833333 Can't calculate square root of the right side. The solution to this equation could not be determined.
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