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Simplifying 5x2 + -2x + -108 = 0 Reorder the terms: -108 + -2x + 5x2 = 0 Solving -108 + -2x + 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'. -21.6 + -0.4x + x2 = 0 Move the constant term to the right: Add '21.6' to each side of the equation. -21.6 + -0.4x + 21.6 + x2 = 0 + 21.6 Reorder the terms: -21.6 + 21.6 + -0.4x + x2 = 0 + 21.6 Combine like terms: -21.6 + 21.6 = 0.0 0.0 + -0.4x + x2 = 0 + 21.6 -0.4x + x2 = 0 + 21.6 Combine like terms: 0 + 21.6 = 21.6 -0.4x + x2 = 21.6 The x term is -0.4x. Take half its coefficient (-0.2). Square it (0.04) and add it to both sides. Add '0.04' to each side of the equation. -0.4x + 0.04 + x2 = 21.6 + 0.04 Reorder the terms: 0.04 + -0.4x + x2 = 21.6 + 0.04 Combine like terms: 21.6 + 0.04 = 21.64 0.04 + -0.4x + x2 = 21.64 Factor a perfect square on the left side: (x + -0.2)(x + -0.2) = 21.64 Calculate the square root of the right side: 4.65188134 Break this problem into two subproblems by setting (x + -0.2) equal to 4.65188134 and -4.65188134.Subproblem 1
x + -0.2 = 4.65188134 Simplifying x + -0.2 = 4.65188134 Reorder the terms: -0.2 + x = 4.65188134 Solving -0.2 + x = 4.65188134 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2' to each side of the equation. -0.2 + 0.2 + x = 4.65188134 + 0.2 Combine like terms: -0.2 + 0.2 = 0.0 0.0 + x = 4.65188134 + 0.2 x = 4.65188134 + 0.2 Combine like terms: 4.65188134 + 0.2 = 4.85188134 x = 4.85188134 Simplifying x = 4.85188134Subproblem 2
x + -0.2 = -4.65188134 Simplifying x + -0.2 = -4.65188134 Reorder the terms: -0.2 + x = -4.65188134 Solving -0.2 + x = -4.65188134 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2' to each side of the equation. -0.2 + 0.2 + x = -4.65188134 + 0.2 Combine like terms: -0.2 + 0.2 = 0.0 0.0 + x = -4.65188134 + 0.2 x = -4.65188134 + 0.2 Combine like terms: -4.65188134 + 0.2 = -4.45188134 x = -4.45188134 Simplifying x = -4.45188134Solution
The solution to the problem is based on the solutions from the subproblems. x = {4.85188134, -4.45188134}
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