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Simplifying (x + -3)(x + 9) = 4 Reorder the terms: (-3 + x)(x + 9) = 4 Reorder the terms: (-3 + x)(9 + x) = 4 Multiply (-3 + x) * (9 + x) (-3(9 + x) + x(9 + x)) = 4 ((9 * -3 + x * -3) + x(9 + x)) = 4 ((-27 + -3x) + x(9 + x)) = 4 (-27 + -3x + (9 * x + x * x)) = 4 (-27 + -3x + (9x + x2)) = 4 Combine like terms: -3x + 9x = 6x (-27 + 6x + x2) = 4 Solving -27 + 6x + x2 = 4 Solving for variable 'x'. Reorder the terms: -27 + -4 + 6x + x2 = 4 + -4 Combine like terms: -27 + -4 = -31 -31 + 6x + x2 = 4 + -4 Combine like terms: 4 + -4 = 0 -31 + 6x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '31' to each side of the equation. -31 + 6x + 31 + x2 = 0 + 31 Reorder the terms: -31 + 31 + 6x + x2 = 0 + 31 Combine like terms: -31 + 31 = 0 0 + 6x + x2 = 0 + 31 6x + x2 = 0 + 31 Combine like terms: 0 + 31 = 31 6x + x2 = 31 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 = 31 + 9 Reorder the terms: 9 + 6x + x2 = 31 + 9 Combine like terms: 31 + 9 = 40 9 + 6x + x2 = 40 Factor a perfect square on the left side: (x + 3)(x + 3) = 40 Calculate the square root of the right side: 6.32455532 Break this problem into two subproblems by setting (x + 3) equal to 6.32455532 and -6.32455532.Subproblem 1
x + 3 = 6.32455532 Simplifying x + 3 = 6.32455532 Reorder the terms: 3 + x = 6.32455532 Solving 3 + x = 6.32455532 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 = 6.32455532 + -3 Combine like terms: 3 + -3 = 0 0 + x = 6.32455532 + -3 x = 6.32455532 + -3 Combine like terms: 6.32455532 + -3 = 3.32455532 x = 3.32455532 Simplifying x = 3.32455532Subproblem 2
x + 3 = -6.32455532 Simplifying x + 3 = -6.32455532 Reorder the terms: 3 + x = -6.32455532 Solving 3 + x = -6.32455532 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 = -6.32455532 + -3 Combine like terms: 3 + -3 = 0 0 + x = -6.32455532 + -3 x = -6.32455532 + -3 Combine like terms: -6.32455532 + -3 = -9.32455532 x = -9.32455532 Simplifying x = -9.32455532Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.32455532, -9.32455532}
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