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Simplifying (x + 7)(x + -8) + -1(5x + -7)(x + 6) = 0 Reorder the terms: (7 + x)(x + -8) + -1(5x + -7)(x + 6) = 0 Reorder the terms: (7 + x)(-8 + x) + -1(5x + -7)(x + 6) = 0 Multiply (7 + x) * (-8 + x) (7(-8 + x) + x(-8 + x)) + -1(5x + -7)(x + 6) = 0 ((-8 * 7 + x * 7) + x(-8 + x)) + -1(5x + -7)(x + 6) = 0 ((-56 + 7x) + x(-8 + x)) + -1(5x + -7)(x + 6) = 0 (-56 + 7x + (-8 * x + x * x)) + -1(5x + -7)(x + 6) = 0 (-56 + 7x + (-8x + x2)) + -1(5x + -7)(x + 6) = 0 Combine like terms: 7x + -8x = -1x (-56 + -1x + x2) + -1(5x + -7)(x + 6) = 0 Reorder the terms: -56 + -1x + x2 + -1(-7 + 5x)(x + 6) = 0 Reorder the terms: -56 + -1x + x2 + -1(-7 + 5x)(6 + x) = 0 Multiply (-7 + 5x) * (6 + x) -56 + -1x + x2 + -1(-7(6 + x) + 5x * (6 + x)) = 0 -56 + -1x + x2 + -1((6 * -7 + x * -7) + 5x * (6 + x)) = 0 -56 + -1x + x2 + -1((-42 + -7x) + 5x * (6 + x)) = 0 -56 + -1x + x2 + -1(-42 + -7x + (6 * 5x + x * 5x)) = 0 -56 + -1x + x2 + -1(-42 + -7x + (30x + 5x2)) = 0 Combine like terms: -7x + 30x = 23x -56 + -1x + x2 + -1(-42 + 23x + 5x2) = 0 -56 + -1x + x2 + (-42 * -1 + 23x * -1 + 5x2 * -1) = 0 -56 + -1x + x2 + (42 + -23x + -5x2) = 0 Reorder the terms: -56 + 42 + -1x + -23x + x2 + -5x2 = 0 Combine like terms: -56 + 42 = -14 -14 + -1x + -23x + x2 + -5x2 = 0 Combine like terms: -1x + -23x = -24x -14 + -24x + x2 + -5x2 = 0 Combine like terms: x2 + -5x2 = -4x2 -14 + -24x + -4x2 = 0 Solving -14 + -24x + -4x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '-2'. -2(7 + 12x + 2x2) = 0 Ignore the factor -2.Subproblem 1
Set the factor '(7 + 12x + 2x2)' equal to zero and attempt to solve: Simplifying 7 + 12x + 2x2 = 0 Solving 7 + 12x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 3.5 + 6x + x2 = 0 Move the constant term to the right: Add '-3.5' to each side of the equation. 3.5 + 6x + -3.5 + x2 = 0 + -3.5 Reorder the terms: 3.5 + -3.5 + 6x + x2 = 0 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + 6x + x2 = 0 + -3.5 6x + x2 = 0 + -3.5 Combine like terms: 0 + -3.5 = -3.5 6x + x2 = -3.5 The x term is 6x. Take half its coefficient (3). Square it (9) and add it to both sides. Add '9' to each side of the equation. 6x + 9 + x2 = -3.5 + 9 Reorder the terms: 9 + 6x + x2 = -3.5 + 9 Combine like terms: -3.5 + 9 = 5.5 9 + 6x + x2 = 5.5 Factor a perfect square on the left side: (x + 3)(x + 3) = 5.5 Calculate the square root of the right side: 2.34520788 Break this problem into two subproblems by setting (x + 3) equal to 2.34520788 and -2.34520788.Subproblem 1
x + 3 = 2.34520788 Simplifying x + 3 = 2.34520788 Reorder the terms: 3 + x = 2.34520788 Solving 3 + x = 2.34520788 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 2.34520788 + -3 Combine like terms: 3 + -3 = 0 0 + x = 2.34520788 + -3 x = 2.34520788 + -3 Combine like terms: 2.34520788 + -3 = -0.65479212 x = -0.65479212 Simplifying x = -0.65479212Subproblem 2
x + 3 = -2.34520788 Simplifying x + 3 = -2.34520788 Reorder the terms: 3 + x = -2.34520788 Solving 3 + x = -2.34520788 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = -2.34520788 + -3 Combine like terms: 3 + -3 = 0 0 + x = -2.34520788 + -3 x = -2.34520788 + -3 Combine like terms: -2.34520788 + -3 = -5.34520788 x = -5.34520788 Simplifying x = -5.34520788Solution
The solution to the problem is based on the solutions from the subproblems. x = {-0.65479212, -5.34520788}Solution
x = {-0.65479212, -5.34520788}
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