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Simplifying 5(x + x + 2 + x + 4) = x(x + 2) + -72 Reorder the terms: 5(2 + 4 + x + x + x) = x(x + 2) + -72 Combine like terms: 2 + 4 = 6 5(6 + x + x + x) = x(x + 2) + -72 Combine like terms: x + x = 2x 5(6 + 2x + x) = x(x + 2) + -72 Combine like terms: 2x + x = 3x 5(6 + 3x) = x(x + 2) + -72 (6 * 5 + 3x * 5) = x(x + 2) + -72 (30 + 15x) = x(x + 2) + -72 Reorder the terms: 30 + 15x = x(2 + x) + -72 30 + 15x = (2 * x + x * x) + -72 30 + 15x = (2x + x2) + -72 Reorder the terms: 30 + 15x = -72 + 2x + x2 Solving 30 + 15x = -72 + 2x + x2 Solving for variable 'x'. Reorder the terms: 30 + 72 + 15x + -2x + -1x2 = -72 + 2x + x2 + 72 + -2x + -1x2 Combine like terms: 30 + 72 = 102 102 + 15x + -2x + -1x2 = -72 + 2x + x2 + 72 + -2x + -1x2 Combine like terms: 15x + -2x = 13x 102 + 13x + -1x2 = -72 + 2x + x2 + 72 + -2x + -1x2 Reorder the terms: 102 + 13x + -1x2 = -72 + 72 + 2x + -2x + x2 + -1x2 Combine like terms: -72 + 72 = 0 102 + 13x + -1x2 = 0 + 2x + -2x + x2 + -1x2 102 + 13x + -1x2 = 2x + -2x + x2 + -1x2 Combine like terms: 2x + -2x = 0 102 + 13x + -1x2 = 0 + x2 + -1x2 102 + 13x + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 102 + 13x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. -102 + -13x + x2 = 0 Move the constant term to the right: Add '102' to each side of the equation. -102 + -13x + 102 + x2 = 0 + 102 Reorder the terms: -102 + 102 + -13x + x2 = 0 + 102 Combine like terms: -102 + 102 = 0 0 + -13x + x2 = 0 + 102 -13x + x2 = 0 + 102 Combine like terms: 0 + 102 = 102 -13x + x2 = 102 The x term is -13x. Take half its coefficient (-6.5). Square it (42.25) and add it to both sides. Add '42.25' to each side of the equation. -13x + 42.25 + x2 = 102 + 42.25 Reorder the terms: 42.25 + -13x + x2 = 102 + 42.25 Combine like terms: 102 + 42.25 = 144.25 42.25 + -13x + x2 = 144.25 Factor a perfect square on the left side: (x + -6.5)(x + -6.5) = 144.25 Calculate the square root of the right side: 12.010412149 Break this problem into two subproblems by setting (x + -6.5) equal to 12.010412149 and -12.010412149.Subproblem 1
x + -6.5 = 12.010412149 Simplifying x + -6.5 = 12.010412149 Reorder the terms: -6.5 + x = 12.010412149 Solving -6.5 + x = 12.010412149 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.5' to each side of the equation. -6.5 + 6.5 + x = 12.010412149 + 6.5 Combine like terms: -6.5 + 6.5 = 0.0 0.0 + x = 12.010412149 + 6.5 x = 12.010412149 + 6.5 Combine like terms: 12.010412149 + 6.5 = 18.510412149 x = 18.510412149 Simplifying x = 18.510412149Subproblem 2
x + -6.5 = -12.010412149 Simplifying x + -6.5 = -12.010412149 Reorder the terms: -6.5 + x = -12.010412149 Solving -6.5 + x = -12.010412149 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.5' to each side of the equation. -6.5 + 6.5 + x = -12.010412149 + 6.5 Combine like terms: -6.5 + 6.5 = 0.0 0.0 + x = -12.010412149 + 6.5 x = -12.010412149 + 6.5 Combine like terms: -12.010412149 + 6.5 = -5.510412149 x = -5.510412149 Simplifying x = -5.510412149Solution
The solution to the problem is based on the solutions from the subproblems. x = {18.510412149, -5.510412149}
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