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Simplifying (x + -3)(x + -5) = 20 Reorder the terms: (-3 + x)(x + -5) = 20 Reorder the terms: (-3 + x)(-5 + x) = 20 Multiply (-3 + x) * (-5 + x) (-3(-5 + x) + x(-5 + x)) = 20 ((-5 * -3 + x * -3) + x(-5 + x)) = 20 ((15 + -3x) + x(-5 + x)) = 20 (15 + -3x + (-5 * x + x * x)) = 20 (15 + -3x + (-5x + x2)) = 20 Combine like terms: -3x + -5x = -8x (15 + -8x + x2) = 20 Solving 15 + -8x + x2 = 20 Solving for variable 'x'. Reorder the terms: 15 + -20 + -8x + x2 = 20 + -20 Combine like terms: 15 + -20 = -5 -5 + -8x + x2 = 20 + -20 Combine like terms: 20 + -20 = 0 -5 + -8x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '5' to each side of the equation. -5 + -8x + 5 + x2 = 0 + 5 Reorder the terms: -5 + 5 + -8x + x2 = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -8x + x2 = 0 + 5 -8x + x2 = 0 + 5 Combine like terms: 0 + 5 = 5 -8x + x2 = 5 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 = 5 + 16 Reorder the terms: 16 + -8x + x2 = 5 + 16 Combine like terms: 5 + 16 = 21 16 + -8x + x2 = 21 Factor a perfect square on the left side: (x + -4)(x + -4) = 21 Calculate the square root of the right side: 4.582575695 Break this problem into two subproblems by setting (x + -4) equal to 4.582575695 and -4.582575695.Subproblem 1
x + -4 = 4.582575695 Simplifying x + -4 = 4.582575695 Reorder the terms: -4 + x = 4.582575695 Solving -4 + x = 4.582575695 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 = 4.582575695 + 4 Combine like terms: -4 + 4 = 0 0 + x = 4.582575695 + 4 x = 4.582575695 + 4 Combine like terms: 4.582575695 + 4 = 8.582575695 x = 8.582575695 Simplifying x = 8.582575695Subproblem 2
x + -4 = -4.582575695 Simplifying x + -4 = -4.582575695 Reorder the terms: -4 + x = -4.582575695 Solving -4 + x = -4.582575695 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 = -4.582575695 + 4 Combine like terms: -4 + 4 = 0 0 + x = -4.582575695 + 4 x = -4.582575695 + 4 Combine like terms: -4.582575695 + 4 = -0.582575695 x = -0.582575695 Simplifying x = -0.582575695Solution
The solution to the problem is based on the solutions from the subproblems. x = {8.582575695, -0.582575695}
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