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Simplifying x2 + 20x + -64 = 0 Reorder the terms: -64 + 20x + x2 = 0 Solving -64 + 20x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '64' to each side of the equation. -64 + 20x + 64 + x2 = 0 + 64 Reorder the terms: -64 + 64 + 20x + x2 = 0 + 64 Combine like terms: -64 + 64 = 0 0 + 20x + x2 = 0 + 64 20x + x2 = 0 + 64 Combine like terms: 0 + 64 = 64 20x + x2 = 64 The x term is 20x. Take half its coefficient (10). Square it (100) and add it to both sides. Add '100' to each side of the equation. 20x + 100 + x2 = 64 + 100 Reorder the terms: 100 + 20x + x2 = 64 + 100 Combine like terms: 64 + 100 = 164 100 + 20x + x2 = 164 Factor a perfect square on the left side: (x + 10)(x + 10) = 164 Calculate the square root of the right side: 12.806248475 Break this problem into two subproblems by setting (x + 10) equal to 12.806248475 and -12.806248475.Subproblem 1
x + 10 = 12.806248475 Simplifying x + 10 = 12.806248475 Reorder the terms: 10 + x = 12.806248475 Solving 10 + x = 12.806248475 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = 12.806248475 + -10 Combine like terms: 10 + -10 = 0 0 + x = 12.806248475 + -10 x = 12.806248475 + -10 Combine like terms: 12.806248475 + -10 = 2.806248475 x = 2.806248475 Simplifying x = 2.806248475Subproblem 2
x + 10 = -12.806248475 Simplifying x + 10 = -12.806248475 Reorder the terms: 10 + x = -12.806248475 Solving 10 + x = -12.806248475 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = -12.806248475 + -10 Combine like terms: 10 + -10 = 0 0 + x = -12.806248475 + -10 x = -12.806248475 + -10 Combine like terms: -12.806248475 + -10 = -22.806248475 x = -22.806248475 Simplifying x = -22.806248475Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.806248475, -22.806248475}
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