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Simplifying 2x2 + 5x = 240 Reorder the terms: 5x + 2x2 = 240 Solving 5x + 2x2 = 240 Solving for variable 'x'. Reorder the terms: -240 + 5x + 2x2 = 240 + -240 Combine like terms: 240 + -240 = 0 -240 + 5x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -120 + 2.5x + x2 = 0 Move the constant term to the right: Add '120' to each side of the equation. -120 + 2.5x + 120 + x2 = 0 + 120 Reorder the terms: -120 + 120 + 2.5x + x2 = 0 + 120 Combine like terms: -120 + 120 = 0 0 + 2.5x + x2 = 0 + 120 2.5x + x2 = 0 + 120 Combine like terms: 0 + 120 = 120 2.5x + x2 = 120 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 = 120 + 1.5625 Reorder the terms: 1.5625 + 2.5x + x2 = 120 + 1.5625 Combine like terms: 120 + 1.5625 = 121.5625 1.5625 + 2.5x + x2 = 121.5625 Factor a perfect square on the left side: (x + 1.25)(x + 1.25) = 121.5625 Calculate the square root of the right side: 11.025538536 Break this problem into two subproblems by setting (x + 1.25) equal to 11.025538536 and -11.025538536.Subproblem 1
x + 1.25 = 11.025538536 Simplifying x + 1.25 = 11.025538536 Reorder the terms: 1.25 + x = 11.025538536 Solving 1.25 + x = 11.025538536 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 = 11.025538536 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + x = 11.025538536 + -1.25 x = 11.025538536 + -1.25 Combine like terms: 11.025538536 + -1.25 = 9.775538536 x = 9.775538536 Simplifying x = 9.775538536Subproblem 2
x + 1.25 = -11.025538536 Simplifying x + 1.25 = -11.025538536 Reorder the terms: 1.25 + x = -11.025538536 Solving 1.25 + x = -11.025538536 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 = -11.025538536 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + x = -11.025538536 + -1.25 x = -11.025538536 + -1.25 Combine like terms: -11.025538536 + -1.25 = -12.275538536 x = -12.275538536 Simplifying x = -12.275538536Solution
The solution to the problem is based on the solutions from the subproblems. x = {9.775538536, -12.275538536}
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