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Simplifying 81x2 + x + -4 = 0 Reorder the terms: -4 + x + 81x2 = 0 Solving -4 + x + 81x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 81 the coefficient of the squared term: Divide each side by '81'. -0.04938271605 + 0.01234567901x + x2 = 0 Move the constant term to the right: Add '0.04938271605' to each side of the equation. -0.04938271605 + 0.01234567901x + 0.04938271605 + x2 = 0 + 0.04938271605 Reorder the terms: -0.04938271605 + 0.04938271605 + 0.01234567901x + x2 = 0 + 0.04938271605 Combine like terms: -0.04938271605 + 0.04938271605 = 0.00000000000 0.00000000000 + 0.01234567901x + x2 = 0 + 0.04938271605 0.01234567901x + x2 = 0 + 0.04938271605 Combine like terms: 0 + 0.04938271605 = 0.04938271605 0.01234567901x + x2 = 0.04938271605 The x term is x. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. 0.01234567901x + 0.25 + x2 = 0.04938271605 + 0.25 Reorder the terms: 0.25 + 0.01234567901x + x2 = 0.04938271605 + 0.25 Combine like terms: 0.04938271605 + 0.25 = 0.29938271605 0.25 + 0.01234567901x + x2 = 0.29938271605 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = 0.29938271605 Calculate the square root of the right side: 0.547158767 Break this problem into two subproblems by setting (x + 0.5) equal to 0.547158767 and -0.547158767.Subproblem 1
x + 0.5 = 0.547158767 Simplifying x + 0.5 = 0.547158767 Reorder the terms: 0.5 + x = 0.547158767 Solving 0.5 + x = 0.547158767 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 0.547158767 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 0.547158767 + -0.5 x = 0.547158767 + -0.5 Combine like terms: 0.547158767 + -0.5 = 0.047158767 x = 0.047158767 Simplifying x = 0.047158767Subproblem 2
x + 0.5 = -0.547158767 Simplifying x + 0.5 = -0.547158767 Reorder the terms: 0.5 + x = -0.547158767 Solving 0.5 + x = -0.547158767 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -0.547158767 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -0.547158767 + -0.5 x = -0.547158767 + -0.5 Combine like terms: -0.547158767 + -0.5 = -1.047158767 x = -1.047158767 Simplifying x = -1.047158767Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.047158767, -1.047158767}
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