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Simplifying (x + -9)(x + -1) = 16 Reorder the terms: (-9 + x)(x + -1) = 16 Reorder the terms: (-9 + x)(-1 + x) = 16 Multiply (-9 + x) * (-1 + x) (-9(-1 + x) + x(-1 + x)) = 16 ((-1 * -9 + x * -9) + x(-1 + x)) = 16 ((9 + -9x) + x(-1 + x)) = 16 (9 + -9x + (-1 * x + x * x)) = 16 (9 + -9x + (-1x + x2)) = 16 Combine like terms: -9x + -1x = -10x (9 + -10x + x2) = 16 Solving 9 + -10x + x2 = 16 Solving for variable 'x'. Reorder the terms: 9 + -16 + -10x + x2 = 16 + -16 Combine like terms: 9 + -16 = -7 -7 + -10x + x2 = 16 + -16 Combine like terms: 16 + -16 = 0 -7 + -10x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '7' to each side of the equation. -7 + -10x + 7 + x2 = 0 + 7 Reorder the terms: -7 + 7 + -10x + x2 = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -10x + x2 = 0 + 7 -10x + x2 = 0 + 7 Combine like terms: 0 + 7 = 7 -10x + x2 = 7 The x term is -10x. Take half its coefficient (-5). Square it (25) and add it to both sides. Add '25' to each side of the equation. -10x + 25 + x2 = 7 + 25 Reorder the terms: 25 + -10x + x2 = 7 + 25 Combine like terms: 7 + 25 = 32 25 + -10x + x2 = 32 Factor a perfect square on the left side: (x + -5)(x + -5) = 32 Calculate the square root of the right side: 5.656854249 Break this problem into two subproblems by setting (x + -5) equal to 5.656854249 and -5.656854249.Subproblem 1
x + -5 = 5.656854249 Simplifying x + -5 = 5.656854249 Reorder the terms: -5 + x = 5.656854249 Solving -5 + x = 5.656854249 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = 5.656854249 + 5 Combine like terms: -5 + 5 = 0 0 + x = 5.656854249 + 5 x = 5.656854249 + 5 Combine like terms: 5.656854249 + 5 = 10.656854249 x = 10.656854249 Simplifying x = 10.656854249Subproblem 2
x + -5 = -5.656854249 Simplifying x + -5 = -5.656854249 Reorder the terms: -5 + x = -5.656854249 Solving -5 + x = -5.656854249 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = -5.656854249 + 5 Combine like terms: -5 + 5 = 0 0 + x = -5.656854249 + 5 x = -5.656854249 + 5 Combine like terms: -5.656854249 + 5 = -0.656854249 x = -0.656854249 Simplifying x = -0.656854249Solution
The solution to the problem is based on the solutions from the subproblems. x = {10.656854249, -0.656854249}
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