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Simplifying (4x + 5)(3x + -7) + -1(x + 2)(4x + -2) = 72 + -33x Reorder the terms: (5 + 4x)(3x + -7) + -1(x + 2)(4x + -2) = 72 + -33x Reorder the terms: (5 + 4x)(-7 + 3x) + -1(x + 2)(4x + -2) = 72 + -33x Multiply (5 + 4x) * (-7 + 3x) (5(-7 + 3x) + 4x * (-7 + 3x)) + -1(x + 2)(4x + -2) = 72 + -33x ((-7 * 5 + 3x * 5) + 4x * (-7 + 3x)) + -1(x + 2)(4x + -2) = 72 + -33x ((-35 + 15x) + 4x * (-7 + 3x)) + -1(x + 2)(4x + -2) = 72 + -33x (-35 + 15x + (-7 * 4x + 3x * 4x)) + -1(x + 2)(4x + -2) = 72 + -33x (-35 + 15x + (-28x + 12x2)) + -1(x + 2)(4x + -2) = 72 + -33x Combine like terms: 15x + -28x = -13x (-35 + -13x + 12x2) + -1(x + 2)(4x + -2) = 72 + -33x Reorder the terms: -35 + -13x + 12x2 + -1(2 + x)(4x + -2) = 72 + -33x Reorder the terms: -35 + -13x + 12x2 + -1(2 + x)(-2 + 4x) = 72 + -33x Multiply (2 + x) * (-2 + 4x) -35 + -13x + 12x2 + -1(2(-2 + 4x) + x(-2 + 4x)) = 72 + -33x -35 + -13x + 12x2 + -1((-2 * 2 + 4x * 2) + x(-2 + 4x)) = 72 + -33x -35 + -13x + 12x2 + -1((-4 + 8x) + x(-2 + 4x)) = 72 + -33x -35 + -13x + 12x2 + -1(-4 + 8x + (-2 * x + 4x * x)) = 72 + -33x -35 + -13x + 12x2 + -1(-4 + 8x + (-2x + 4x2)) = 72 + -33x Combine like terms: 8x + -2x = 6x -35 + -13x + 12x2 + -1(-4 + 6x + 4x2) = 72 + -33x -35 + -13x + 12x2 + (-4 * -1 + 6x * -1 + 4x2 * -1) = 72 + -33x -35 + -13x + 12x2 + (4 + -6x + -4x2) = 72 + -33x Reorder the terms: -35 + 4 + -13x + -6x + 12x2 + -4x2 = 72 + -33x Combine like terms: -35 + 4 = -31 -31 + -13x + -6x + 12x2 + -4x2 = 72 + -33x Combine like terms: -13x + -6x = -19x -31 + -19x + 12x2 + -4x2 = 72 + -33x Combine like terms: 12x2 + -4x2 = 8x2 -31 + -19x + 8x2 = 72 + -33x Solving -31 + -19x + 8x2 = 72 + -33x Solving for variable 'x'. Reorder the terms: -31 + -72 + -19x + 33x + 8x2 = 72 + -33x + -72 + 33x Combine like terms: -31 + -72 = -103 -103 + -19x + 33x + 8x2 = 72 + -33x + -72 + 33x Combine like terms: -19x + 33x = 14x -103 + 14x + 8x2 = 72 + -33x + -72 + 33x Reorder the terms: -103 + 14x + 8x2 = 72 + -72 + -33x + 33x Combine like terms: 72 + -72 = 0 -103 + 14x + 8x2 = 0 + -33x + 33x -103 + 14x + 8x2 = -33x + 33x Combine like terms: -33x + 33x = 0 -103 + 14x + 8x2 = 0 Begin completing the square. Divide all terms by 8 the coefficient of the squared term: Divide each side by '8'. -12.875 + 1.75x + x2 = 0 Move the constant term to the right: Add '12.875' to each side of the equation. -12.875 + 1.75x + 12.875 + x2 = 0 + 12.875 Reorder the terms: -12.875 + 12.875 + 1.75x + x2 = 0 + 12.875 Combine like terms: -12.875 + 12.875 = 0.000 0.000 + 1.75x + x2 = 0 + 12.875 1.75x + x2 = 0 + 12.875 Combine like terms: 0 + 12.875 = 12.875 1.75x + x2 = 12.875 The x term is 1.75x. Take half its coefficient (0.875). Square it (0.765625) and add it to both sides. Add '0.765625' to each side of the equation. 1.75x + 0.765625 + x2 = 12.875 + 0.765625 Reorder the terms: 0.765625 + 1.75x + x2 = 12.875 + 0.765625 Combine like terms: 12.875 + 0.765625 = 13.640625 0.765625 + 1.75x + x2 = 13.640625 Factor a perfect square on the left side: (x + 0.875)(x + 0.875) = 13.640625 Calculate the square root of the right side: 3.693321676 Break this problem into two subproblems by setting (x + 0.875) equal to 3.693321676 and -3.693321676.Subproblem 1
x + 0.875 = 3.693321676 Simplifying x + 0.875 = 3.693321676 Reorder the terms: 0.875 + x = 3.693321676 Solving 0.875 + x = 3.693321676 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.875' to each side of the equation. 0.875 + -0.875 + x = 3.693321676 + -0.875 Combine like terms: 0.875 + -0.875 = 0.000 0.000 + x = 3.693321676 + -0.875 x = 3.693321676 + -0.875 Combine like terms: 3.693321676 + -0.875 = 2.818321676 x = 2.818321676 Simplifying x = 2.818321676Subproblem 2
x + 0.875 = -3.693321676 Simplifying x + 0.875 = -3.693321676 Reorder the terms: 0.875 + x = -3.693321676 Solving 0.875 + x = -3.693321676 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.875' to each side of the equation. 0.875 + -0.875 + x = -3.693321676 + -0.875 Combine like terms: 0.875 + -0.875 = 0.000 0.000 + x = -3.693321676 + -0.875 x = -3.693321676 + -0.875 Combine like terms: -3.693321676 + -0.875 = -4.568321676 x = -4.568321676 Simplifying x = -4.568321676Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.818321676, -4.568321676}
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