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Simplifying 12x2 + 4x + 15 = 0 Reorder the terms: 15 + 4x + 12x2 = 0 Solving 15 + 4x + 12x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 12 the coefficient of the squared term: Divide each side by '12'. 1.25 + 0.3333333333x + x2 = 0 Move the constant term to the right: Add '-1.25' to each side of the equation. 1.25 + 0.3333333333x + -1.25 + x2 = 0 + -1.25 Reorder the terms: 1.25 + -1.25 + 0.3333333333x + x2 = 0 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + 0.3333333333x + x2 = 0 + -1.25 0.3333333333x + x2 = 0 + -1.25 Combine like terms: 0 + -1.25 = -1.25 0.3333333333x + x2 = -1.25 The x term is 0.3333333333x. Take half its coefficient (0.1666666667). Square it (0.02777777779) and add it to both sides. Add '0.02777777779' to each side of the equation. 0.3333333333x + 0.02777777779 + x2 = -1.25 + 0.02777777779 Reorder the terms: 0.02777777779 + 0.3333333333x + x2 = -1.25 + 0.02777777779 Combine like terms: -1.25 + 0.02777777779 = -1.22222222221 0.02777777779 + 0.3333333333x + x2 = -1.22222222221 Factor a perfect square on the left side: (x + 0.1666666667)(x + 0.1666666667) = -1.22222222221 Can't calculate square root of the right side. The solution to this equation could not be determined.
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