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Simplifying 5x2 + -20x + -26 = -8 Reorder the terms: -26 + -20x + 5x2 = -8 Solving -26 + -20x + 5x2 = -8 Solving for variable 'x'. Reorder the terms: -26 + 8 + -20x + 5x2 = -8 + 8 Combine like terms: -26 + 8 = -18 -18 + -20x + 5x2 = -8 + 8 Combine like terms: -8 + 8 = 0 -18 + -20x + 5x2 = 0 Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -3.6 + -4x + x2 = 0 Move the constant term to the right: Add '3.6' to each side of the equation. -3.6 + -4x + 3.6 + x2 = 0 + 3.6 Reorder the terms: -3.6 + 3.6 + -4x + x2 = 0 + 3.6 Combine like terms: -3.6 + 3.6 = 0.0 0.0 + -4x + x2 = 0 + 3.6 -4x + x2 = 0 + 3.6 Combine like terms: 0 + 3.6 = 3.6 -4x + x2 = 3.6 The x term is -4x. Take half its coefficient (-2). Square it (4) and add it to both sides. Add '4' to each side of the equation. -4x + 4 + x2 = 3.6 + 4 Reorder the terms: 4 + -4x + x2 = 3.6 + 4 Combine like terms: 3.6 + 4 = 7.6 4 + -4x + x2 = 7.6 Factor a perfect square on the left side: (x + -2)(x + -2) = 7.6 Calculate the square root of the right side: 2.75680975 Break this problem into two subproblems by setting (x + -2) equal to 2.75680975 and -2.75680975.Subproblem 1
x + -2 = 2.75680975 Simplifying x + -2 = 2.75680975 Reorder the terms: -2 + x = 2.75680975 Solving -2 + x = 2.75680975 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 2.75680975 + 2 Combine like terms: -2 + 2 = 0 0 + x = 2.75680975 + 2 x = 2.75680975 + 2 Combine like terms: 2.75680975 + 2 = 4.75680975 x = 4.75680975 Simplifying x = 4.75680975Subproblem 2
x + -2 = -2.75680975 Simplifying x + -2 = -2.75680975 Reorder the terms: -2 + x = -2.75680975 Solving -2 + x = -2.75680975 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -2.75680975 + 2 Combine like terms: -2 + 2 = 0 0 + x = -2.75680975 + 2 x = -2.75680975 + 2 Combine like terms: -2.75680975 + 2 = -0.75680975 x = -0.75680975 Simplifying x = -0.75680975Solution
The solution to the problem is based on the solutions from the subproblems. x = {4.75680975, -0.75680975}
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