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Simplifying 2x2 + 5x + -245 = 0 Reorder the terms: -245 + 5x + 2x2 = 0 Solving -245 + 5x + 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'. -122.5 + 2.5x + x2 = 0 Move the constant term to the right: Add '122.5' to each side of the equation. -122.5 + 2.5x + 122.5 + x2 = 0 + 122.5 Reorder the terms: -122.5 + 122.5 + 2.5x + x2 = 0 + 122.5 Combine like terms: -122.5 + 122.5 = 0.0 0.0 + 2.5x + x2 = 0 + 122.5 2.5x + x2 = 0 + 122.5 Combine like terms: 0 + 122.5 = 122.5 2.5x + x2 = 122.5 The x term is 2.5x. Take half its coefficient (1.25). Square it (1.5625) and add it to both sides. Add '1.5625' to each side of the equation. 2.5x + 1.5625 + x2 = 122.5 + 1.5625 Reorder the terms: 1.5625 + 2.5x + x2 = 122.5 + 1.5625 Combine like terms: 122.5 + 1.5625 = 124.0625 1.5625 + 2.5x + x2 = 124.0625 Factor a perfect square on the left side: (x + 1.25)(x + 1.25) = 124.0625 Calculate the square root of the right side: 11.138334705 Break this problem into two subproblems by setting (x + 1.25) equal to 11.138334705 and -11.138334705.Subproblem 1
x + 1.25 = 11.138334705 Simplifying x + 1.25 = 11.138334705 Reorder the terms: 1.25 + x = 11.138334705 Solving 1.25 + x = 11.138334705 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + x = 11.138334705 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + x = 11.138334705 + -1.25 x = 11.138334705 + -1.25 Combine like terms: 11.138334705 + -1.25 = 9.888334705 x = 9.888334705 Simplifying x = 9.888334705Subproblem 2
x + 1.25 = -11.138334705 Simplifying x + 1.25 = -11.138334705 Reorder the terms: 1.25 + x = -11.138334705 Solving 1.25 + x = -11.138334705 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + x = -11.138334705 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + x = -11.138334705 + -1.25 x = -11.138334705 + -1.25 Combine like terms: -11.138334705 + -1.25 = -12.388334705 x = -12.388334705 Simplifying x = -12.388334705Solution
The solution to the problem is based on the solutions from the subproblems. x = {9.888334705, -12.388334705}
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