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Simplifying 2x2 + -26x + 7 = 0 Reorder the terms: 7 + -26x + 2x2 = 0 Solving 7 + -26x + 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 + -13x + x2 = 0 Move the constant term to the right: Add '-3.5' to each side of the equation. 3.5 + -13x + -3.5 + x2 = 0 + -3.5 Reorder the terms: 3.5 + -3.5 + -13x + x2 = 0 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + -13x + x2 = 0 + -3.5 -13x + x2 = 0 + -3.5 Combine like terms: 0 + -3.5 = -3.5 -13x + x2 = -3.5 The x term is -13x. Take half its coefficient (-6.5). Square it (42.25) and add it to both sides. Add '42.25' to each side of the equation. -13x + 42.25 + x2 = -3.5 + 42.25 Reorder the terms: 42.25 + -13x + x2 = -3.5 + 42.25 Combine like terms: -3.5 + 42.25 = 38.75 42.25 + -13x + x2 = 38.75 Factor a perfect square on the left side: (x + -6.5)(x + -6.5) = 38.75 Calculate the square root of the right side: 6.224949799 Break this problem into two subproblems by setting (x + -6.5) equal to 6.224949799 and -6.224949799.Subproblem 1
x + -6.5 = 6.224949799 Simplifying x + -6.5 = 6.224949799 Reorder the terms: -6.5 + x = 6.224949799 Solving -6.5 + x = 6.224949799 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.5' to each side of the equation. -6.5 + 6.5 + x = 6.224949799 + 6.5 Combine like terms: -6.5 + 6.5 = 0.0 0.0 + x = 6.224949799 + 6.5 x = 6.224949799 + 6.5 Combine like terms: 6.224949799 + 6.5 = 12.724949799 x = 12.724949799 Simplifying x = 12.724949799Subproblem 2
x + -6.5 = -6.224949799 Simplifying x + -6.5 = -6.224949799 Reorder the terms: -6.5 + x = -6.224949799 Solving -6.5 + x = -6.224949799 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.5' to each side of the equation. -6.5 + 6.5 + x = -6.224949799 + 6.5 Combine like terms: -6.5 + 6.5 = 0.0 0.0 + x = -6.224949799 + 6.5 x = -6.224949799 + 6.5 Combine like terms: -6.224949799 + 6.5 = 0.275050201 x = 0.275050201 Simplifying x = 0.275050201Solution
The solution to the problem is based on the solutions from the subproblems. x = {12.724949799, 0.275050201}
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