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Simplifying 2x2 + 20x + -425 = 0 Reorder the terms: -425 + 20x + 2x2 = 0 Solving -425 + 20x + 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'. -212.5 + 10x + x2 = 0 Move the constant term to the right: Add '212.5' to each side of the equation. -212.5 + 10x + 212.5 + x2 = 0 + 212.5 Reorder the terms: -212.5 + 212.5 + 10x + x2 = 0 + 212.5 Combine like terms: -212.5 + 212.5 = 0.0 0.0 + 10x + x2 = 0 + 212.5 10x + x2 = 0 + 212.5 Combine like terms: 0 + 212.5 = 212.5 10x + x2 = 212.5 The x term is 10x. Take half its coefficient (5). Square it (25) and add it to both sides. Add '25' to each side of the equation. 10x + 25 + x2 = 212.5 + 25 Reorder the terms: 25 + 10x + x2 = 212.5 + 25 Combine like terms: 212.5 + 25 = 237.5 25 + 10x + x2 = 237.5 Factor a perfect square on the left side: (x + 5)(x + 5) = 237.5 Calculate the square root of the right side: 15.411035007 Break this problem into two subproblems by setting (x + 5) equal to 15.411035007 and -15.411035007.Subproblem 1
x + 5 = 15.411035007 Simplifying x + 5 = 15.411035007 Reorder the terms: 5 + x = 15.411035007 Solving 5 + x = 15.411035007 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 15.411035007 + -5 Combine like terms: 5 + -5 = 0 0 + x = 15.411035007 + -5 x = 15.411035007 + -5 Combine like terms: 15.411035007 + -5 = 10.411035007 x = 10.411035007 Simplifying x = 10.411035007Subproblem 2
x + 5 = -15.411035007 Simplifying x + 5 = -15.411035007 Reorder the terms: 5 + x = -15.411035007 Solving 5 + x = -15.411035007 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = -15.411035007 + -5 Combine like terms: 5 + -5 = 0 0 + x = -15.411035007 + -5 x = -15.411035007 + -5 Combine like terms: -15.411035007 + -5 = -20.411035007 x = -20.411035007 Simplifying x = -20.411035007Solution
The solution to the problem is based on the solutions from the subproblems. x = {10.411035007, -20.411035007}
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