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Simplifying (3x + -4)(-2x + 7) = 9 Reorder the terms: (-4 + 3x)(-2x + 7) = 9 Reorder the terms: (-4 + 3x)(7 + -2x) = 9 Multiply (-4 + 3x) * (7 + -2x) (-4(7 + -2x) + 3x * (7 + -2x)) = 9 ((7 * -4 + -2x * -4) + 3x * (7 + -2x)) = 9 ((-28 + 8x) + 3x * (7 + -2x)) = 9 (-28 + 8x + (7 * 3x + -2x * 3x)) = 9 (-28 + 8x + (21x + -6x2)) = 9 Combine like terms: 8x + 21x = 29x (-28 + 29x + -6x2) = 9 Solving -28 + 29x + -6x2 = 9 Solving for variable 'x'. Reorder the terms: -28 + -9 + 29x + -6x2 = 9 + -9 Combine like terms: -28 + -9 = -37 -37 + 29x + -6x2 = 9 + -9 Combine like terms: 9 + -9 = 0 -37 + 29x + -6x2 = 0 Begin completing the square. Divide all terms by -6 the coefficient of the squared term: Divide each side by '-6'. 6.166666667 + -4.833333333x + x2 = 0 Move the constant term to the right: Add '-6.166666667' to each side of the equation. 6.166666667 + -4.833333333x + -6.166666667 + x2 = 0 + -6.166666667 Reorder the terms: 6.166666667 + -6.166666667 + -4.833333333x + x2 = 0 + -6.166666667 Combine like terms: 6.166666667 + -6.166666667 = 0.000000000 0.000000000 + -4.833333333x + x2 = 0 + -6.166666667 -4.833333333x + x2 = 0 + -6.166666667 Combine like terms: 0 + -6.166666667 = -6.166666667 -4.833333333x + x2 = -6.166666667 The x term is -4.833333333x. Take half its coefficient (-2.416666667). Square it (5.840277779) and add it to both sides. Add '5.840277779' to each side of the equation. -4.833333333x + 5.840277779 + x2 = -6.166666667 + 5.840277779 Reorder the terms: 5.840277779 + -4.833333333x + x2 = -6.166666667 + 5.840277779 Combine like terms: -6.166666667 + 5.840277779 = -0.326388888 5.840277779 + -4.833333333x + x2 = -0.326388888 Factor a perfect square on the left side: (x + -2.416666667)(x + -2.416666667) = -0.326388888 Can't calculate square root of the right side. The solution to this equation could not be determined.
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