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Simplifying (x + -3)(x + -4) + -1(x + 4) = 0 Reorder the terms: (-3 + x)(x + -4) + -1(x + 4) = 0 Reorder the terms: (-3 + x)(-4 + x) + -1(x + 4) = 0 Multiply (-3 + x) * (-4 + x) (-3(-4 + x) + x(-4 + x)) + -1(x + 4) = 0 ((-4 * -3 + x * -3) + x(-4 + x)) + -1(x + 4) = 0 ((12 + -3x) + x(-4 + x)) + -1(x + 4) = 0 (12 + -3x + (-4 * x + x * x)) + -1(x + 4) = 0 (12 + -3x + (-4x + x2)) + -1(x + 4) = 0 Combine like terms: -3x + -4x = -7x (12 + -7x + x2) + -1(x + 4) = 0 Reorder the terms: 12 + -7x + x2 + -1(4 + x) = 0 12 + -7x + x2 + (4 * -1 + x * -1) = 0 12 + -7x + x2 + (-4 + -1x) = 0 Reorder the terms: 12 + -4 + -7x + -1x + x2 = 0 Combine like terms: 12 + -4 = 8 8 + -7x + -1x + x2 = 0 Combine like terms: -7x + -1x = -8x 8 + -8x + x2 = 0 Solving 8 + -8x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-8' to each side of the equation. 8 + -8x + -8 + x2 = 0 + -8 Reorder the terms: 8 + -8 + -8x + x2 = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -8x + x2 = 0 + -8 -8x + x2 = 0 + -8 Combine like terms: 0 + -8 = -8 -8x + x2 = -8 The x term is -8x. Take half its coefficient (-4). Square it (16) and add it to both sides. Add '16' to each side of the equation. -8x + 16 + x2 = -8 + 16 Reorder the terms: 16 + -8x + x2 = -8 + 16 Combine like terms: -8 + 16 = 8 16 + -8x + x2 = 8 Factor a perfect square on the left side: (x + -4)(x + -4) = 8 Calculate the square root of the right side: 2.828427125 Break this problem into two subproblems by setting (x + -4) equal to 2.828427125 and -2.828427125.Subproblem 1
x + -4 = 2.828427125 Simplifying x + -4 = 2.828427125 Reorder the terms: -4 + x = 2.828427125 Solving -4 + x = 2.828427125 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 2.828427125 + 4 Combine like terms: -4 + 4 = 0 0 + x = 2.828427125 + 4 x = 2.828427125 + 4 Combine like terms: 2.828427125 + 4 = 6.828427125 x = 6.828427125 Simplifying x = 6.828427125Subproblem 2
x + -4 = -2.828427125 Simplifying x + -4 = -2.828427125 Reorder the terms: -4 + x = -2.828427125 Solving -4 + x = -2.828427125 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -2.828427125 + 4 Combine like terms: -4 + 4 = 0 0 + x = -2.828427125 + 4 x = -2.828427125 + 4 Combine like terms: -2.828427125 + 4 = 1.171572875 x = 1.171572875 Simplifying x = 1.171572875Solution
The solution to the problem is based on the solutions from the subproblems. x = {6.828427125, 1.171572875}
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