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Simplifying (x2 + 7x + 6) + -1(-1x2 + -6x + -1x + -1) = 0 Reorder the terms: (6 + 7x + x2) + -1(-1x2 + -6x + -1x + -1) = 0 Remove parenthesis around (6 + 7x + x2) 6 + 7x + x2 + -1(-1x2 + -6x + -1x + -1) = 0 Reorder the terms: 6 + 7x + x2 + -1(-1 + -6x + -1x + -1x2) = 0 Combine like terms: -6x + -1x = -7x 6 + 7x + x2 + -1(-1 + -7x + -1x2) = 0 6 + 7x + x2 + (-1 * -1 + -7x * -1 + -1x2 * -1) = 0 6 + 7x + x2 + (1 + 7x + 1x2) = 0 Reorder the terms: 6 + 1 + 7x + 7x + x2 + 1x2 = 0 Combine like terms: 6 + 1 = 7 7 + 7x + 7x + x2 + 1x2 = 0 Combine like terms: 7x + 7x = 14x 7 + 14x + x2 + 1x2 = 0 Combine like terms: x2 + 1x2 = 2x2 7 + 14x + 2x2 = 0 Solving 7 + 14x + 2x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 3.5 + 7x + x2 = 0 Move the constant term to the right: Add '-3.5' to each side of the equation. 3.5 + 7x + -3.5 + x2 = 0 + -3.5 Reorder the terms: 3.5 + -3.5 + 7x + x2 = 0 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + 7x + x2 = 0 + -3.5 7x + x2 = 0 + -3.5 Combine like terms: 0 + -3.5 = -3.5 7x + x2 = -3.5 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 = -3.5 + 12.25 Reorder the terms: 12.25 + 7x + x2 = -3.5 + 12.25 Combine like terms: -3.5 + 12.25 = 8.75 12.25 + 7x + x2 = 8.75 Factor a perfect square on the left side: (x + 3.5)(x + 3.5) = 8.75 Calculate the square root of the right side: 2.958039892 Break this problem into two subproblems by setting (x + 3.5) equal to 2.958039892 and -2.958039892.Subproblem 1
x + 3.5 = 2.958039892 Simplifying x + 3.5 = 2.958039892 Reorder the terms: 3.5 + x = 2.958039892 Solving 3.5 + x = 2.958039892 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 = 2.958039892 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 2.958039892 + -3.5 x = 2.958039892 + -3.5 Combine like terms: 2.958039892 + -3.5 = -0.541960108 x = -0.541960108 Simplifying x = -0.541960108Subproblem 2
x + 3.5 = -2.958039892 Simplifying x + 3.5 = -2.958039892 Reorder the terms: 3.5 + x = -2.958039892 Solving 3.5 + x = -2.958039892 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 = -2.958039892 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -2.958039892 + -3.5 x = -2.958039892 + -3.5 Combine like terms: -2.958039892 + -3.5 = -6.458039892 x = -6.458039892 Simplifying x = -6.458039892Solution
The solution to the problem is based on the solutions from the subproblems. x = {-0.541960108, -6.458039892}
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