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Simplifying (x + -2)(2x + 1) = -1(x + 3)(x + 7) Reorder the terms: (-2 + x)(2x + 1) = -1(x + 3)(x + 7) Reorder the terms: (-2 + x)(1 + 2x) = -1(x + 3)(x + 7) Multiply (-2 + x) * (1 + 2x) (-2(1 + 2x) + x(1 + 2x)) = -1(x + 3)(x + 7) ((1 * -2 + 2x * -2) + x(1 + 2x)) = -1(x + 3)(x + 7) ((-2 + -4x) + x(1 + 2x)) = -1(x + 3)(x + 7) (-2 + -4x + (1 * x + 2x * x)) = -1(x + 3)(x + 7) (-2 + -4x + (1x + 2x2)) = -1(x + 3)(x + 7) Combine like terms: -4x + 1x = -3x (-2 + -3x + 2x2) = -1(x + 3)(x + 7) Reorder the terms: -2 + -3x + 2x2 = -1(3 + x)(x + 7) Reorder the terms: -2 + -3x + 2x2 = -1(3 + x)(7 + x) Multiply (3 + x) * (7 + x) -2 + -3x + 2x2 = -1(3(7 + x) + x(7 + x)) -2 + -3x + 2x2 = -1((7 * 3 + x * 3) + x(7 + x)) -2 + -3x + 2x2 = -1((21 + 3x) + x(7 + x)) -2 + -3x + 2x2 = -1(21 + 3x + (7 * x + x * x)) -2 + -3x + 2x2 = -1(21 + 3x + (7x + x2)) Combine like terms: 3x + 7x = 10x -2 + -3x + 2x2 = -1(21 + 10x + x2) -2 + -3x + 2x2 = (21 * -1 + 10x * -1 + x2 * -1) -2 + -3x + 2x2 = (-21 + -10x + -1x2) Solving -2 + -3x + 2x2 = -21 + -10x + -1x2 Solving for variable 'x'. Reorder the terms: -2 + 21 + -3x + 10x + 2x2 + x2 = -21 + -10x + -1x2 + 21 + 10x + x2 Combine like terms: -2 + 21 = 19 19 + -3x + 10x + 2x2 + x2 = -21 + -10x + -1x2 + 21 + 10x + x2 Combine like terms: -3x + 10x = 7x 19 + 7x + 2x2 + x2 = -21 + -10x + -1x2 + 21 + 10x + x2 Combine like terms: 2x2 + x2 = 3x2 19 + 7x + 3x2 = -21 + -10x + -1x2 + 21 + 10x + x2 Reorder the terms: 19 + 7x + 3x2 = -21 + 21 + -10x + 10x + -1x2 + x2 Combine like terms: -21 + 21 = 0 19 + 7x + 3x2 = 0 + -10x + 10x + -1x2 + x2 19 + 7x + 3x2 = -10x + 10x + -1x2 + x2 Combine like terms: -10x + 10x = 0 19 + 7x + 3x2 = 0 + -1x2 + x2 19 + 7x + 3x2 = -1x2 + x2 Combine like terms: -1x2 + x2 = 0 19 + 7x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. 6.333333333 + 2.333333333x + x2 = 0 Move the constant term to the right: Add '-6.333333333' to each side of the equation. 6.333333333 + 2.333333333x + -6.333333333 + x2 = 0 + -6.333333333 Reorder the terms: 6.333333333 + -6.333333333 + 2.333333333x + x2 = 0 + -6.333333333 Combine like terms: 6.333333333 + -6.333333333 = 0.000000000 0.000000000 + 2.333333333x + x2 = 0 + -6.333333333 2.333333333x + x2 = 0 + -6.333333333 Combine like terms: 0 + -6.333333333 = -6.333333333 2.333333333x + x2 = -6.333333333 The x term is 2.333333333x. Take half its coefficient (1.166666667). Square it (1.361111112) and add it to both sides. Add '1.361111112' to each side of the equation. 2.333333333x + 1.361111112 + x2 = -6.333333333 + 1.361111112 Reorder the terms: 1.361111112 + 2.333333333x + x2 = -6.333333333 + 1.361111112 Combine like terms: -6.333333333 + 1.361111112 = -4.972222221 1.361111112 + 2.333333333x + x2 = -4.972222221 Factor a perfect square on the left side: (x + 1.166666667)(x + 1.166666667) = -4.972222221 Can't calculate square root of the right side. The solution to this equation could not be determined.
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