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Simplifying x2 + 7x + -107 = 0 Reorder the terms: -107 + 7x + x2 = 0 Solving -107 + 7x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '107' to each side of the equation. -107 + 7x + 107 + x2 = 0 + 107 Reorder the terms: -107 + 107 + 7x + x2 = 0 + 107 Combine like terms: -107 + 107 = 0 0 + 7x + x2 = 0 + 107 7x + x2 = 0 + 107 Combine like terms: 0 + 107 = 107 7x + x2 = 107 The x term is 7x. Take half its coefficient (3.5). Square it (12.25) and add it to both sides. Add '12.25' to each side of the equation. 7x + 12.25 + x2 = 107 + 12.25 Reorder the terms: 12.25 + 7x + x2 = 107 + 12.25 Combine like terms: 107 + 12.25 = 119.25 12.25 + 7x + x2 = 119.25 Factor a perfect square on the left side: (x + 3.5)(x + 3.5) = 119.25 Calculate the square root of the right side: 10.920164834 Break this problem into two subproblems by setting (x + 3.5) equal to 10.920164834 and -10.920164834.Subproblem 1
x + 3.5 = 10.920164834 Simplifying x + 3.5 = 10.920164834 Reorder the terms: 3.5 + x = 10.920164834 Solving 3.5 + x = 10.920164834 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = 10.920164834 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 10.920164834 + -3.5 x = 10.920164834 + -3.5 Combine like terms: 10.920164834 + -3.5 = 7.420164834 x = 7.420164834 Simplifying x = 7.420164834Subproblem 2
x + 3.5 = -10.920164834 Simplifying x + 3.5 = -10.920164834 Reorder the terms: 3.5 + x = -10.920164834 Solving 3.5 + x = -10.920164834 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = -10.920164834 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -10.920164834 + -3.5 x = -10.920164834 + -3.5 Combine like terms: -10.920164834 + -3.5 = -14.420164834 x = -14.420164834 Simplifying x = -14.420164834Solution
The solution to the problem is based on the solutions from the subproblems. x = {7.420164834, -14.420164834}
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