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Simplifying 18x2 + -21x + 28 = 0 Reorder the terms: 28 + -21x + 18x2 = 0 Solving 28 + -21x + 18x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 18 the coefficient of the squared term: Divide each side by '18'. 1.555555556 + -1.166666667x + x2 = 0 Move the constant term to the right: Add '-1.555555556' to each side of the equation. 1.555555556 + -1.166666667x + -1.555555556 + x2 = 0 + -1.555555556 Reorder the terms: 1.555555556 + -1.555555556 + -1.166666667x + x2 = 0 + -1.555555556 Combine like terms: 1.555555556 + -1.555555556 = 0.000000000 0.000000000 + -1.166666667x + x2 = 0 + -1.555555556 -1.166666667x + x2 = 0 + -1.555555556 Combine like terms: 0 + -1.555555556 = -1.555555556 -1.166666667x + x2 = -1.555555556 The x term is -1.166666667x. Take half its coefficient (-0.5833333335). Square it (0.3402777780) and add it to both sides. Add '0.3402777780' to each side of the equation. -1.166666667x + 0.3402777780 + x2 = -1.555555556 + 0.3402777780 Reorder the terms: 0.3402777780 + -1.166666667x + x2 = -1.555555556 + 0.3402777780 Combine like terms: -1.555555556 + 0.3402777780 = -1.215277778 0.3402777780 + -1.166666667x + x2 = -1.215277778 Factor a perfect square on the left side: (x + -0.5833333335)(x + -0.5833333335) = -1.215277778 Can't calculate square root of the right side. The solution to this equation could not be determined.
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