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Simplifying 3x2 + -10x + 15 = 0 Reorder the terms: 15 + -10x + 3x2 = 0 Solving 15 + -10x + 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'. 5 + -3.333333333x + x2 = 0 Move the constant term to the right: Add '-5' to each side of the equation. 5 + -3.333333333x + -5 + x2 = 0 + -5 Reorder the terms: 5 + -5 + -3.333333333x + x2 = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -3.333333333x + x2 = 0 + -5 -3.333333333x + x2 = 0 + -5 Combine like terms: 0 + -5 = -5 -3.333333333x + x2 = -5 The x term is -3.333333333x. Take half its coefficient (-1.666666667). Square it (2.777777779) and add it to both sides. Add '2.777777779' to each side of the equation. -3.333333333x + 2.777777779 + x2 = -5 + 2.777777779 Reorder the terms: 2.777777779 + -3.333333333x + x2 = -5 + 2.777777779 Combine like terms: -5 + 2.777777779 = -2.222222221 2.777777779 + -3.333333333x + x2 = -2.222222221 Factor a perfect square on the left side: (x + -1.666666667)(x + -1.666666667) = -2.222222221 Can't calculate square root of the right side. The solution to this equation could not be determined.
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