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Simplifying x2 + 20x + -196 = 0 Reorder the terms: -196 + 20x + x2 = 0 Solving -196 + 20x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '196' to each side of the equation. -196 + 20x + 196 + x2 = 0 + 196 Reorder the terms: -196 + 196 + 20x + x2 = 0 + 196 Combine like terms: -196 + 196 = 0 0 + 20x + x2 = 0 + 196 20x + x2 = 0 + 196 Combine like terms: 0 + 196 = 196 20x + x2 = 196 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 = 196 + 100 Reorder the terms: 100 + 20x + x2 = 196 + 100 Combine like terms: 196 + 100 = 296 100 + 20x + x2 = 296 Factor a perfect square on the left side: (x + 10)(x + 10) = 296 Calculate the square root of the right side: 17.204650534 Break this problem into two subproblems by setting (x + 10) equal to 17.204650534 and -17.204650534.Subproblem 1
x + 10 = 17.204650534 Simplifying x + 10 = 17.204650534 Reorder the terms: 10 + x = 17.204650534 Solving 10 + x = 17.204650534 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 = 17.204650534 + -10 Combine like terms: 10 + -10 = 0 0 + x = 17.204650534 + -10 x = 17.204650534 + -10 Combine like terms: 17.204650534 + -10 = 7.204650534 x = 7.204650534 Simplifying x = 7.204650534Subproblem 2
x + 10 = -17.204650534 Simplifying x + 10 = -17.204650534 Reorder the terms: 10 + x = -17.204650534 Solving 10 + x = -17.204650534 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 = -17.204650534 + -10 Combine like terms: 10 + -10 = 0 0 + x = -17.204650534 + -10 x = -17.204650534 + -10 Combine like terms: -17.204650534 + -10 = -27.204650534 x = -27.204650534 Simplifying x = -27.204650534Solution
The solution to the problem is based on the solutions from the subproblems. x = {7.204650534, -27.204650534}
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