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Simplifying 5x2 + 4x + -11 = 0 Reorder the terms: -11 + 4x + 5x2 = 0 Solving -11 + 4x + 5x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -2.2 + 0.8x + x2 = 0 Move the constant term to the right: Add '2.2' to each side of the equation. -2.2 + 0.8x + 2.2 + x2 = 0 + 2.2 Reorder the terms: -2.2 + 2.2 + 0.8x + x2 = 0 + 2.2 Combine like terms: -2.2 + 2.2 = 0.0 0.0 + 0.8x + x2 = 0 + 2.2 0.8x + x2 = 0 + 2.2 Combine like terms: 0 + 2.2 = 2.2 0.8x + x2 = 2.2 The x term is 0.8x. Take half its coefficient (0.4). Square it (0.16) and add it to both sides. Add '0.16' to each side of the equation. 0.8x + 0.16 + x2 = 2.2 + 0.16 Reorder the terms: 0.16 + 0.8x + x2 = 2.2 + 0.16 Combine like terms: 2.2 + 0.16 = 2.36 0.16 + 0.8x + x2 = 2.36 Factor a perfect square on the left side: (x + 0.4)(x + 0.4) = 2.36 Calculate the square root of the right side: 1.53622915 Break this problem into two subproblems by setting (x + 0.4) equal to 1.53622915 and -1.53622915.Subproblem 1
x + 0.4 = 1.53622915 Simplifying x + 0.4 = 1.53622915 Reorder the terms: 0.4 + x = 1.53622915 Solving 0.4 + x = 1.53622915 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4' to each side of the equation. 0.4 + -0.4 + x = 1.53622915 + -0.4 Combine like terms: 0.4 + -0.4 = 0.0 0.0 + x = 1.53622915 + -0.4 x = 1.53622915 + -0.4 Combine like terms: 1.53622915 + -0.4 = 1.13622915 x = 1.13622915 Simplifying x = 1.13622915Subproblem 2
x + 0.4 = -1.53622915 Simplifying x + 0.4 = -1.53622915 Reorder the terms: 0.4 + x = -1.53622915 Solving 0.4 + x = -1.53622915 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4' to each side of the equation. 0.4 + -0.4 + x = -1.53622915 + -0.4 Combine like terms: 0.4 + -0.4 = 0.0 0.0 + x = -1.53622915 + -0.4 x = -1.53622915 + -0.4 Combine like terms: -1.53622915 + -0.4 = -1.93622915 x = -1.93622915 Simplifying x = -1.93622915Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.13622915, -1.93622915}
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