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Simplifying x2 + 20x + -88 = 0 Reorder the terms: -88 + 20x + x2 = 0 Solving -88 + 20x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '88' to each side of the equation. -88 + 20x + 88 + x2 = 0 + 88 Reorder the terms: -88 + 88 + 20x + x2 = 0 + 88 Combine like terms: -88 + 88 = 0 0 + 20x + x2 = 0 + 88 20x + x2 = 0 + 88 Combine like terms: 0 + 88 = 88 20x + x2 = 88 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 = 88 + 100 Reorder the terms: 100 + 20x + x2 = 88 + 100 Combine like terms: 88 + 100 = 188 100 + 20x + x2 = 188 Factor a perfect square on the left side: (x + 10)(x + 10) = 188 Calculate the square root of the right side: 13.711309201 Break this problem into two subproblems by setting (x + 10) equal to 13.711309201 and -13.711309201.Subproblem 1
x + 10 = 13.711309201 Simplifying x + 10 = 13.711309201 Reorder the terms: 10 + x = 13.711309201 Solving 10 + x = 13.711309201 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 = 13.711309201 + -10 Combine like terms: 10 + -10 = 0 0 + x = 13.711309201 + -10 x = 13.711309201 + -10 Combine like terms: 13.711309201 + -10 = 3.711309201 x = 3.711309201 Simplifying x = 3.711309201Subproblem 2
x + 10 = -13.711309201 Simplifying x + 10 = -13.711309201 Reorder the terms: 10 + x = -13.711309201 Solving 10 + x = -13.711309201 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 = -13.711309201 + -10 Combine like terms: 10 + -10 = 0 0 + x = -13.711309201 + -10 x = -13.711309201 + -10 Combine like terms: -13.711309201 + -10 = -23.711309201 x = -23.711309201 Simplifying x = -23.711309201Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.711309201, -23.711309201}
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