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Simplifying 4x2 + 20x + 100 = 99 Reorder the terms: 100 + 20x + 4x2 = 99 Solving 100 + 20x + 4x2 = 99 Solving for variable 'x'. Reorder the terms: 100 + -99 + 20x + 4x2 = 99 + -99 Combine like terms: 100 + -99 = 1 1 + 20x + 4x2 = 99 + -99 Combine like terms: 99 + -99 = 0 1 + 20x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. 0.25 + 5x + x2 = 0 Move the constant term to the right: Add '-0.25' to each side of the equation. 0.25 + 5x + -0.25 + x2 = 0 + -0.25 Reorder the terms: 0.25 + -0.25 + 5x + x2 = 0 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + 5x + x2 = 0 + -0.25 5x + x2 = 0 + -0.25 Combine like terms: 0 + -0.25 = -0.25 5x + x2 = -0.25 The x term is 5x. Take half its coefficient (2.5). Square it (6.25) and add it to both sides. Add '6.25' to each side of the equation. 5x + 6.25 + x2 = -0.25 + 6.25 Reorder the terms: 6.25 + 5x + x2 = -0.25 + 6.25 Combine like terms: -0.25 + 6.25 = 6 6.25 + 5x + x2 = 6 Factor a perfect square on the left side: (x + 2.5)(x + 2.5) = 6 Calculate the square root of the right side: 2.449489743 Break this problem into two subproblems by setting (x + 2.5) equal to 2.449489743 and -2.449489743.Subproblem 1
x + 2.5 = 2.449489743 Simplifying x + 2.5 = 2.449489743 Reorder the terms: 2.5 + x = 2.449489743 Solving 2.5 + x = 2.449489743 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 2.449489743 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 2.449489743 + -2.5 x = 2.449489743 + -2.5 Combine like terms: 2.449489743 + -2.5 = -0.050510257 x = -0.050510257 Simplifying x = -0.050510257Subproblem 2
x + 2.5 = -2.449489743 Simplifying x + 2.5 = -2.449489743 Reorder the terms: 2.5 + x = -2.449489743 Solving 2.5 + x = -2.449489743 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -2.449489743 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -2.449489743 + -2.5 x = -2.449489743 + -2.5 Combine like terms: -2.449489743 + -2.5 = -4.949489743 x = -4.949489743 Simplifying x = -4.949489743Solution
The solution to the problem is based on the solutions from the subproblems. x = {-0.050510257, -4.949489743}
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