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Simplifying 3x2 + -20x + 40 = 0 Reorder the terms: 40 + -20x + 3x2 = 0 Solving 40 + -20x + 3x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. 13.33333333 + -6.666666667x + x2 = 0 Move the constant term to the right: Add '-13.33333333' to each side of the equation. 13.33333333 + -6.666666667x + -13.33333333 + x2 = 0 + -13.33333333 Reorder the terms: 13.33333333 + -13.33333333 + -6.666666667x + x2 = 0 + -13.33333333 Combine like terms: 13.33333333 + -13.33333333 = 0.00000000 0.00000000 + -6.666666667x + x2 = 0 + -13.33333333 -6.666666667x + x2 = 0 + -13.33333333 Combine like terms: 0 + -13.33333333 = -13.33333333 -6.666666667x + x2 = -13.33333333 The x term is -6.666666667x. Take half its coefficient (-3.333333334). Square it (11.11111112) and add it to both sides. Add '11.11111112' to each side of the equation. -6.666666667x + 11.11111112 + x2 = -13.33333333 + 11.11111112 Reorder the terms: 11.11111112 + -6.666666667x + x2 = -13.33333333 + 11.11111112 Combine like terms: -13.33333333 + 11.11111112 = -2.22222221 11.11111112 + -6.666666667x + x2 = -2.22222221 Factor a perfect square on the left side: (x + -3.333333334)(x + -3.333333334) = -2.22222221 Can't calculate square root of the right side. The solution to this equation could not be determined.
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