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Simplifying 9x2 + 12x + 136 = 0 Reorder the terms: 136 + 12x + 9x2 = 0 Solving 136 + 12x + 9x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 9 the coefficient of the squared term: Divide each side by '9'. 15.11111111 + 1.333333333x + x2 = 0 Move the constant term to the right: Add '-15.11111111' to each side of the equation. 15.11111111 + 1.333333333x + -15.11111111 + x2 = 0 + -15.11111111 Reorder the terms: 15.11111111 + -15.11111111 + 1.333333333x + x2 = 0 + -15.11111111 Combine like terms: 15.11111111 + -15.11111111 = 0.00000000 0.00000000 + 1.333333333x + x2 = 0 + -15.11111111 1.333333333x + x2 = 0 + -15.11111111 Combine like terms: 0 + -15.11111111 = -15.11111111 1.333333333x + x2 = -15.11111111 The x term is 1.333333333x. Take half its coefficient (0.6666666665). Square it (0.4444444442) and add it to both sides. Add '0.4444444442' to each side of the equation. 1.333333333x + 0.4444444442 + x2 = -15.11111111 + 0.4444444442 Reorder the terms: 0.4444444442 + 1.333333333x + x2 = -15.11111111 + 0.4444444442 Combine like terms: -15.11111111 + 0.4444444442 = -14.6666666658 0.4444444442 + 1.333333333x + x2 = -14.6666666658 Factor a perfect square on the left side: (x + 0.6666666665)(x + 0.6666666665) = -14.6666666658 Can't calculate square root of the right side. The solution to this equation could not be determined.
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