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Simplifying 5x2 + 7x + -6 + -4x2 + 5 = 0 Reorder the terms: -6 + 5 + 7x + 5x2 + -4x2 = 0 Combine like terms: -6 + 5 = -1 -1 + 7x + 5x2 + -4x2 = 0 Combine like terms: 5x2 + -4x2 = 1x2 -1 + 7x + 1x2 = 0 Solving -1 + 7x + 1x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '1' to each side of the equation. -1 + 7x + 1 + x2 = 0 + 1 Reorder the terms: -1 + 1 + 7x + x2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + 7x + x2 = 0 + 1 7x + x2 = 0 + 1 Combine like terms: 0 + 1 = 1 7x + x2 = 1 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 = 1 + 12.25 Reorder the terms: 12.25 + 7x + x2 = 1 + 12.25 Combine like terms: 1 + 12.25 = 13.25 12.25 + 7x + x2 = 13.25 Factor a perfect square on the left side: (x + 3.5)(x + 3.5) = 13.25 Calculate the square root of the right side: 3.640054945 Break this problem into two subproblems by setting (x + 3.5) equal to 3.640054945 and -3.640054945.Subproblem 1
x + 3.5 = 3.640054945 Simplifying x + 3.5 = 3.640054945 Reorder the terms: 3.5 + x = 3.640054945 Solving 3.5 + x = 3.640054945 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 = 3.640054945 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 3.640054945 + -3.5 x = 3.640054945 + -3.5 Combine like terms: 3.640054945 + -3.5 = 0.140054945 x = 0.140054945 Simplifying x = 0.140054945Subproblem 2
x + 3.5 = -3.640054945 Simplifying x + 3.5 = -3.640054945 Reorder the terms: 3.5 + x = -3.640054945 Solving 3.5 + x = -3.640054945 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 = -3.640054945 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -3.640054945 + -3.5 x = -3.640054945 + -3.5 Combine like terms: -3.640054945 + -3.5 = -7.140054945 x = -7.140054945 Simplifying x = -7.140054945Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.140054945, -7.140054945}
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