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Simplifying 15x2 + 18x + 73 = 0 Reorder the terms: 73 + 18x + 15x2 = 0 Solving 73 + 18x + 15x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 15 the coefficient of the squared term: Divide each side by '15'. 4.866666667 + 1.2x + x2 = 0 Move the constant term to the right: Add '-4.866666667' to each side of the equation. 4.866666667 + 1.2x + -4.866666667 + x2 = 0 + -4.866666667 Reorder the terms: 4.866666667 + -4.866666667 + 1.2x + x2 = 0 + -4.866666667 Combine like terms: 4.866666667 + -4.866666667 = 0.000000000 0.000000000 + 1.2x + x2 = 0 + -4.866666667 1.2x + x2 = 0 + -4.866666667 Combine like terms: 0 + -4.866666667 = -4.866666667 1.2x + x2 = -4.866666667 The x term is 1.2x. Take half its coefficient (0.6). Square it (0.36) and add it to both sides. Add '0.36' to each side of the equation. 1.2x + 0.36 + x2 = -4.866666667 + 0.36 Reorder the terms: 0.36 + 1.2x + x2 = -4.866666667 + 0.36 Combine like terms: -4.866666667 + 0.36 = -4.506666667 0.36 + 1.2x + x2 = -4.506666667 Factor a perfect square on the left side: (x + 0.6)(x + 0.6) = -4.506666667 Can't calculate square root of the right side. The solution to this equation could not be determined.
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