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Simplifying 9 = -3x2 + 5x Reorder the terms: 9 = 5x + -3x2 Solving 9 = 5x + -3x2 Solving for variable 'x'. Reorder the terms: 9 + -5x + 3x2 = 5x + -5x + -3x2 + 3x2 Combine like terms: 5x + -5x = 0 9 + -5x + 3x2 = 0 + -3x2 + 3x2 9 + -5x + 3x2 = -3x2 + 3x2 Combine like terms: -3x2 + 3x2 = 0 9 + -5x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. 3 + -1.666666667x + x2 = 0 Move the constant term to the right: Add '-3' to each side of the equation. 3 + -1.666666667x + -3 + x2 = 0 + -3 Reorder the terms: 3 + -3 + -1.666666667x + x2 = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1.666666667x + x2 = 0 + -3 -1.666666667x + x2 = 0 + -3 Combine like terms: 0 + -3 = -3 -1.666666667x + x2 = -3 The x term is -1.666666667x. Take half its coefficient (-0.8333333335). Square it (0.6944444447) and add it to both sides. Add '0.6944444447' to each side of the equation. -1.666666667x + 0.6944444447 + x2 = -3 + 0.6944444447 Reorder the terms: 0.6944444447 + -1.666666667x + x2 = -3 + 0.6944444447 Combine like terms: -3 + 0.6944444447 = -2.3055555553 0.6944444447 + -1.666666667x + x2 = -2.3055555553 Factor a perfect square on the left side: (x + -0.8333333335)(x + -0.8333333335) = -2.3055555553 Can't calculate square root of the right side. The solution to this equation could not be determined.
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