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Simplifying 4(x + 5) + 7x = -3x(x + -2) Reorder the terms: 4(5 + x) + 7x = -3x(x + -2) (5 * 4 + x * 4) + 7x = -3x(x + -2) (20 + 4x) + 7x = -3x(x + -2) Combine like terms: 4x + 7x = 11x 20 + 11x = -3x(x + -2) Reorder the terms: 20 + 11x = -3x(-2 + x) 20 + 11x = (-2 * -3x + x * -3x) 20 + 11x = (6x + -3x2) Solving 20 + 11x = 6x + -3x2 Solving for variable 'x'. Combine like terms: 11x + -6x = 5x 20 + 5x + 3x2 = 6x + -3x2 + -6x + 3x2 Reorder the terms: 20 + 5x + 3x2 = 6x + -6x + -3x2 + 3x2 Combine like terms: 6x + -6x = 0 20 + 5x + 3x2 = 0 + -3x2 + 3x2 20 + 5x + 3x2 = -3x2 + 3x2 Combine like terms: -3x2 + 3x2 = 0 20 + 5x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. 6.666666667 + 1.666666667x + x2 = 0 Move the constant term to the right: Add '-6.666666667' to each side of the equation. 6.666666667 + 1.666666667x + -6.666666667 + x2 = 0 + -6.666666667 Reorder the terms: 6.666666667 + -6.666666667 + 1.666666667x + x2 = 0 + -6.666666667 Combine like terms: 6.666666667 + -6.666666667 = 0.000000000 0.000000000 + 1.666666667x + x2 = 0 + -6.666666667 1.666666667x + x2 = 0 + -6.666666667 Combine like terms: 0 + -6.666666667 = -6.666666667 1.666666667x + x2 = -6.666666667 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 = -6.666666667 + 0.6944444447 Reorder the terms: 0.6944444447 + 1.666666667x + x2 = -6.666666667 + 0.6944444447 Combine like terms: -6.666666667 + 0.6944444447 = -5.9722222223 0.6944444447 + 1.666666667x + x2 = -5.9722222223 Factor a perfect square on the left side: (x + 0.8333333335)(x + 0.8333333335) = -5.9722222223 Can't calculate square root of the right side. The solution to this equation could not be determined.
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