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Simplifying 0 = 4x2 + -1x + -9 Reorder the terms: 0 = -9 + -1x + 4x2 Solving 0 = -9 + -1x + 4x2 Solving for variable 'x'. Combine like terms: 0 + 9 = 9 9 + x + -4x2 = -9 + -1x + 4x2 + 9 + x + -4x2 Reorder the terms: 9 + x + -4x2 = -9 + 9 + -1x + x + 4x2 + -4x2 Combine like terms: -9 + 9 = 0 9 + x + -4x2 = 0 + -1x + x + 4x2 + -4x2 9 + x + -4x2 = -1x + x + 4x2 + -4x2 Combine like terms: -1x + x = 0 9 + x + -4x2 = 0 + 4x2 + -4x2 9 + x + -4x2 = 4x2 + -4x2 Combine like terms: 4x2 + -4x2 = 0 9 + x + -4x2 = 0 Begin completing the square. Divide all terms by -4 the coefficient of the squared term: Divide each side by '-4'. -2.25 + -0.25x + x2 = 0 Move the constant term to the right: Add '2.25' to each side of the equation. -2.25 + -0.25x + 2.25 + x2 = 0 + 2.25 Reorder the terms: -2.25 + 2.25 + -0.25x + x2 = 0 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + -0.25x + x2 = 0 + 2.25 -0.25x + x2 = 0 + 2.25 Combine like terms: 0 + 2.25 = 2.25 -0.25x + x2 = 2.25 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. -0.25x + 0.25 + x2 = 2.25 + 0.25 Reorder the terms: 0.25 + -0.25x + x2 = 2.25 + 0.25 Combine like terms: 2.25 + 0.25 = 2.5 0.25 + -0.25x + x2 = 2.5 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = 2.5 Calculate the square root of the right side: 1.58113883 Break this problem into two subproblems by setting (x + 0.5) equal to 1.58113883 and -1.58113883.Subproblem 1
x + 0.5 = 1.58113883 Simplifying x + 0.5 = 1.58113883 Reorder the terms: 0.5 + x = 1.58113883 Solving 0.5 + x = 1.58113883 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 = 1.58113883 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 1.58113883 + -0.5 x = 1.58113883 + -0.5 Combine like terms: 1.58113883 + -0.5 = 1.08113883 x = 1.08113883 Simplifying x = 1.08113883Subproblem 2
x + 0.5 = -1.58113883 Simplifying x + 0.5 = -1.58113883 Reorder the terms: 0.5 + x = -1.58113883 Solving 0.5 + x = -1.58113883 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 = -1.58113883 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -1.58113883 + -0.5 x = -1.58113883 + -0.5 Combine like terms: -1.58113883 + -0.5 = -2.08113883 x = -2.08113883 Simplifying x = -2.08113883Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.08113883, -2.08113883}
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