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Simplifying 9x2 + 23x + 15 = 0 Reorder the terms: 15 + 23x + 9x2 = 0 Solving 15 + 23x + 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'. 1.666666667 + 2.555555556x + x2 = 0 Move the constant term to the right: Add '-1.666666667' to each side of the equation. 1.666666667 + 2.555555556x + -1.666666667 + x2 = 0 + -1.666666667 Reorder the terms: 1.666666667 + -1.666666667 + 2.555555556x + x2 = 0 + -1.666666667 Combine like terms: 1.666666667 + -1.666666667 = 0.000000000 0.000000000 + 2.555555556x + x2 = 0 + -1.666666667 2.555555556x + x2 = 0 + -1.666666667 Combine like terms: 0 + -1.666666667 = -1.666666667 2.555555556x + x2 = -1.666666667 The x term is 2.555555556x. Take half its coefficient (1.277777778). Square it (1.632716050) and add it to both sides. Add '1.632716050' to each side of the equation. 2.555555556x + 1.632716050 + x2 = -1.666666667 + 1.632716050 Reorder the terms: 1.632716050 + 2.555555556x + x2 = -1.666666667 + 1.632716050 Combine like terms: -1.666666667 + 1.632716050 = -0.033950617 1.632716050 + 2.555555556x + x2 = -0.033950617 Factor a perfect square on the left side: (x + 1.277777778)(x + 1.277777778) = -0.033950617 Can't calculate square root of the right side. The solution to this equation could not be determined.
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