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Simplifying (1x + -3)(x + 7) = 11x + 11 Reorder the terms: (-3 + 1x)(x + 7) = 11x + 11 Reorder the terms: (-3 + 1x)(7 + x) = 11x + 11 Multiply (-3 + 1x) * (7 + x) (-3(7 + x) + 1x * (7 + x)) = 11x + 11 ((7 * -3 + x * -3) + 1x * (7 + x)) = 11x + 11 ((-21 + -3x) + 1x * (7 + x)) = 11x + 11 (-21 + -3x + (7 * 1x + x * 1x)) = 11x + 11 (-21 + -3x + (7x + 1x2)) = 11x + 11 Combine like terms: -3x + 7x = 4x (-21 + 4x + 1x2) = 11x + 11 Reorder the terms: -21 + 4x + 1x2 = 11 + 11x Solving -21 + 4x + 1x2 = 11 + 11x Solving for variable 'x'. Reorder the terms: -21 + -11 + 4x + -11x + 1x2 = 11 + 11x + -11 + -11x Combine like terms: -21 + -11 = -32 -32 + 4x + -11x + 1x2 = 11 + 11x + -11 + -11x Combine like terms: 4x + -11x = -7x -32 + -7x + 1x2 = 11 + 11x + -11 + -11x Reorder the terms: -32 + -7x + 1x2 = 11 + -11 + 11x + -11x Combine like terms: 11 + -11 = 0 -32 + -7x + 1x2 = 0 + 11x + -11x -32 + -7x + 1x2 = 11x + -11x Combine like terms: 11x + -11x = 0 -32 + -7x + 1x2 = 0 Begin completing the square. Move the constant term to the right: Add '32' to each side of the equation. -32 + -7x + 32 + x2 = 0 + 32 Reorder the terms: -32 + 32 + -7x + x2 = 0 + 32 Combine like terms: -32 + 32 = 0 0 + -7x + x2 = 0 + 32 -7x + x2 = 0 + 32 Combine like terms: 0 + 32 = 32 -7x + x2 = 32 The x term is -7x. Take half its coefficient (-3.5). Square it (12.25) and add it to both sides. Add '12.25' to each side of the equation. -7x + 12.25 + x2 = 32 + 12.25 Reorder the terms: 12.25 + -7x + x2 = 32 + 12.25 Combine like terms: 32 + 12.25 = 44.25 12.25 + -7x + x2 = 44.25 Factor a perfect square on the left side: (x + -3.5)(x + -3.5) = 44.25 Calculate the square root of the right side: 6.652067348 Break this problem into two subproblems by setting (x + -3.5) equal to 6.652067348 and -6.652067348.Subproblem 1
x + -3.5 = 6.652067348 Simplifying x + -3.5 = 6.652067348 Reorder the terms: -3.5 + x = 6.652067348 Solving -3.5 + x = 6.652067348 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = 6.652067348 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = 6.652067348 + 3.5 x = 6.652067348 + 3.5 Combine like terms: 6.652067348 + 3.5 = 10.152067348 x = 10.152067348 Simplifying x = 10.152067348Subproblem 2
x + -3.5 = -6.652067348 Simplifying x + -3.5 = -6.652067348 Reorder the terms: -3.5 + x = -6.652067348 Solving -3.5 + x = -6.652067348 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = -6.652067348 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = -6.652067348 + 3.5 x = -6.652067348 + 3.5 Combine like terms: -6.652067348 + 3.5 = -3.152067348 x = -3.152067348 Simplifying x = -3.152067348Solution
The solution to the problem is based on the solutions from the subproblems. x = {10.152067348, -3.152067348}
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