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Simplifying 9x2 + 6x = -16 Reorder the terms: 6x + 9x2 = -16 Solving 6x + 9x2 = -16 Solving for variable 'x'. Reorder the terms: 16 + 6x + 9x2 = -16 + 16 Combine like terms: -16 + 16 = 0 16 + 6x + 9x2 = 0 Begin completing the square. Divide all terms by 9 the coefficient of the squared term: Divide each side by '9'. 1.777777778 + 0.6666666667x + x2 = 0 Move the constant term to the right: Add '-1.777777778' to each side of the equation. 1.777777778 + 0.6666666667x + -1.777777778 + x2 = 0 + -1.777777778 Reorder the terms: 1.777777778 + -1.777777778 + 0.6666666667x + x2 = 0 + -1.777777778 Combine like terms: 1.777777778 + -1.777777778 = 0.000000000 0.000000000 + 0.6666666667x + x2 = 0 + -1.777777778 0.6666666667x + x2 = 0 + -1.777777778 Combine like terms: 0 + -1.777777778 = -1.777777778 0.6666666667x + x2 = -1.777777778 The x term is 0.6666666667x. Take half its coefficient (0.3333333334). Square it (0.1111111112) and add it to both sides. Add '0.1111111112' to each side of the equation. 0.6666666667x + 0.1111111112 + x2 = -1.777777778 + 0.1111111112 Reorder the terms: 0.1111111112 + 0.6666666667x + x2 = -1.777777778 + 0.1111111112 Combine like terms: -1.777777778 + 0.1111111112 = -1.6666666668 0.1111111112 + 0.6666666667x + x2 = -1.6666666668 Factor a perfect square on the left side: (x + 0.3333333334)(x + 0.3333333334) = -1.6666666668 Can't calculate square root of the right side. The solution to this equation could not be determined.
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