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Simplifying 0 = x2 + 11x + -10 Reorder the terms: 0 = -10 + 11x + x2 Solving 0 = -10 + 11x + x2 Solving for variable 'x'. Combine like terms: 0 + 10 = 10 10 + -11x + -1x2 = -10 + 11x + x2 + 10 + -11x + -1x2 Reorder the terms: 10 + -11x + -1x2 = -10 + 10 + 11x + -11x + x2 + -1x2 Combine like terms: -10 + 10 = 0 10 + -11x + -1x2 = 0 + 11x + -11x + x2 + -1x2 10 + -11x + -1x2 = 11x + -11x + x2 + -1x2 Combine like terms: 11x + -11x = 0 10 + -11x + -1x2 = 0 + x2 + -1x2 10 + -11x + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 10 + -11x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. -10 + 11x + x2 = 0 Move the constant term to the right: Add '10' to each side of the equation. -10 + 11x + 10 + x2 = 0 + 10 Reorder the terms: -10 + 10 + 11x + x2 = 0 + 10 Combine like terms: -10 + 10 = 0 0 + 11x + x2 = 0 + 10 11x + x2 = 0 + 10 Combine like terms: 0 + 10 = 10 11x + x2 = 10 The x term is 11x. Take half its coefficient (5.5). Square it (30.25) and add it to both sides. Add '30.25' to each side of the equation. 11x + 30.25 + x2 = 10 + 30.25 Reorder the terms: 30.25 + 11x + x2 = 10 + 30.25 Combine like terms: 10 + 30.25 = 40.25 30.25 + 11x + x2 = 40.25 Factor a perfect square on the left side: (x + 5.5)(x + 5.5) = 40.25 Calculate the square root of the right side: 6.34428877 Break this problem into two subproblems by setting (x + 5.5) equal to 6.34428877 and -6.34428877.Subproblem 1
x + 5.5 = 6.34428877 Simplifying x + 5.5 = 6.34428877 Reorder the terms: 5.5 + x = 6.34428877 Solving 5.5 + x = 6.34428877 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + x = 6.34428877 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x = 6.34428877 + -5.5 x = 6.34428877 + -5.5 Combine like terms: 6.34428877 + -5.5 = 0.84428877 x = 0.84428877 Simplifying x = 0.84428877Subproblem 2
x + 5.5 = -6.34428877 Simplifying x + 5.5 = -6.34428877 Reorder the terms: 5.5 + x = -6.34428877 Solving 5.5 + x = -6.34428877 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + x = -6.34428877 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x = -6.34428877 + -5.5 x = -6.34428877 + -5.5 Combine like terms: -6.34428877 + -5.5 = -11.84428877 x = -11.84428877 Simplifying x = -11.84428877Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.84428877, -11.84428877}
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