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Simplifying 3x2 + 18 = -5x Reorder the terms: 18 + 3x2 = -5x Solving 18 + 3x2 = -5x Solving for variable 'x'. Reorder the terms: 18 + 5x + 3x2 = -5x + 5x Combine like terms: -5x + 5x = 0 18 + 5x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. 6 + 1.666666667x + x2 = 0 Move the constant term to the right: Add '-6' to each side of the equation. 6 + 1.666666667x + -6 + x2 = 0 + -6 Reorder the terms: 6 + -6 + 1.666666667x + x2 = 0 + -6 Combine like terms: 6 + -6 = 0 0 + 1.666666667x + x2 = 0 + -6 1.666666667x + x2 = 0 + -6 Combine like terms: 0 + -6 = -6 1.666666667x + x2 = -6 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 = -6 + 0.6944444447 Reorder the terms: 0.6944444447 + 1.666666667x + x2 = -6 + 0.6944444447 Combine like terms: -6 + 0.6944444447 = -5.3055555553 0.6944444447 + 1.666666667x + x2 = -5.3055555553 Factor a perfect square on the left side: (x + 0.8333333335)(x + 0.8333333335) = -5.3055555553 Can't calculate square root of the right side. The solution to this equation could not be determined.
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