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Simplifying 18x2 + 12x = -7 Reorder the terms: 12x + 18x2 = -7 Solving 12x + 18x2 = -7 Solving for variable 'x'. Reorder the terms: 7 + 12x + 18x2 = -7 + 7 Combine like terms: -7 + 7 = 0 7 + 12x + 18x2 = 0 Begin completing the square. Divide all terms by 18 the coefficient of the squared term: Divide each side by '18'. 0.3888888889 + 0.6666666667x + x2 = 0 Move the constant term to the right: Add '-0.3888888889' to each side of the equation. 0.3888888889 + 0.6666666667x + -0.3888888889 + x2 = 0 + -0.3888888889 Reorder the terms: 0.3888888889 + -0.3888888889 + 0.6666666667x + x2 = 0 + -0.3888888889 Combine like terms: 0.3888888889 + -0.3888888889 = 0.0000000000 0.0000000000 + 0.6666666667x + x2 = 0 + -0.3888888889 0.6666666667x + x2 = 0 + -0.3888888889 Combine like terms: 0 + -0.3888888889 = -0.3888888889 0.6666666667x + x2 = -0.3888888889 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 = -0.3888888889 + 0.1111111112 Reorder the terms: 0.1111111112 + 0.6666666667x + x2 = -0.3888888889 + 0.1111111112 Combine like terms: -0.3888888889 + 0.1111111112 = -0.2777777777 0.1111111112 + 0.6666666667x + x2 = -0.2777777777 Factor a perfect square on the left side: (x + 0.3333333334)(x + 0.3333333334) = -0.2777777777 Can't calculate square root of the right side. The solution to this equation could not be determined.
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