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Simplifying 2x2 + 4x + -221 = 0 Reorder the terms: -221 + 4x + 2x2 = 0 Solving -221 + 4x + 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'. -110.5 + 2x + x2 = 0 Move the constant term to the right: Add '110.5' to each side of the equation. -110.5 + 2x + 110.5 + x2 = 0 + 110.5 Reorder the terms: -110.5 + 110.5 + 2x + x2 = 0 + 110.5 Combine like terms: -110.5 + 110.5 = 0.0 0.0 + 2x + x2 = 0 + 110.5 2x + x2 = 0 + 110.5 Combine like terms: 0 + 110.5 = 110.5 2x + x2 = 110.5 The x term is 2x. Take half its coefficient (1). Square it (1) and add it to both sides. Add '1' to each side of the equation. 2x + 1 + x2 = 110.5 + 1 Reorder the terms: 1 + 2x + x2 = 110.5 + 1 Combine like terms: 110.5 + 1 = 111.5 1 + 2x + x2 = 111.5 Factor a perfect square on the left side: (x + 1)(x + 1) = 111.5 Calculate the square root of the right side: 10.559356041 Break this problem into two subproblems by setting (x + 1) equal to 10.559356041 and -10.559356041.Subproblem 1
x + 1 = 10.559356041 Simplifying x + 1 = 10.559356041 Reorder the terms: 1 + x = 10.559356041 Solving 1 + x = 10.559356041 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 10.559356041 + -1 Combine like terms: 1 + -1 = 0 0 + x = 10.559356041 + -1 x = 10.559356041 + -1 Combine like terms: 10.559356041 + -1 = 9.559356041 x = 9.559356041 Simplifying x = 9.559356041Subproblem 2
x + 1 = -10.559356041 Simplifying x + 1 = -10.559356041 Reorder the terms: 1 + x = -10.559356041 Solving 1 + x = -10.559356041 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -10.559356041 + -1 Combine like terms: 1 + -1 = 0 0 + x = -10.559356041 + -1 x = -10.559356041 + -1 Combine like terms: -10.559356041 + -1 = -11.559356041 x = -11.559356041 Simplifying x = -11.559356041Solution
The solution to the problem is based on the solutions from the subproblems. x = {9.559356041, -11.559356041}
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