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Simplifying 2x2 + -16x + -11 = 0 Reorder the terms: -11 + -16x + 2x2 = 0 Solving -11 + -16x + 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'. -5.5 + -8x + x2 = 0 Move the constant term to the right: Add '5.5' to each side of the equation. -5.5 + -8x + 5.5 + x2 = 0 + 5.5 Reorder the terms: -5.5 + 5.5 + -8x + x2 = 0 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + -8x + x2 = 0 + 5.5 -8x + x2 = 0 + 5.5 Combine like terms: 0 + 5.5 = 5.5 -8x + x2 = 5.5 The x term is -8x. Take half its coefficient (-4). Square it (16) and add it to both sides. Add '16' to each side of the equation. -8x + 16 + x2 = 5.5 + 16 Reorder the terms: 16 + -8x + x2 = 5.5 + 16 Combine like terms: 5.5 + 16 = 21.5 16 + -8x + x2 = 21.5 Factor a perfect square on the left side: (x + -4)(x + -4) = 21.5 Calculate the square root of the right side: 4.636809248 Break this problem into two subproblems by setting (x + -4) equal to 4.636809248 and -4.636809248.Subproblem 1
x + -4 = 4.636809248 Simplifying x + -4 = 4.636809248 Reorder the terms: -4 + x = 4.636809248 Solving -4 + x = 4.636809248 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 4.636809248 + 4 Combine like terms: -4 + 4 = 0 0 + x = 4.636809248 + 4 x = 4.636809248 + 4 Combine like terms: 4.636809248 + 4 = 8.636809248 x = 8.636809248 Simplifying x = 8.636809248Subproblem 2
x + -4 = -4.636809248 Simplifying x + -4 = -4.636809248 Reorder the terms: -4 + x = -4.636809248 Solving -4 + x = -4.636809248 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -4.636809248 + 4 Combine like terms: -4 + 4 = 0 0 + x = -4.636809248 + 4 x = -4.636809248 + 4 Combine like terms: -4.636809248 + 4 = -0.636809248 x = -0.636809248 Simplifying x = -0.636809248Solution
The solution to the problem is based on the solutions from the subproblems. x = {8.636809248, -0.636809248}
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