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Simplifying 5x2 + 19x + -8 = 0 Reorder the terms: -8 + 19x + 5x2 = 0 Solving -8 + 19x + 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'. -1.6 + 3.8x + x2 = 0 Move the constant term to the right: Add '1.6' to each side of the equation. -1.6 + 3.8x + 1.6 + x2 = 0 + 1.6 Reorder the terms: -1.6 + 1.6 + 3.8x + x2 = 0 + 1.6 Combine like terms: -1.6 + 1.6 = 0.0 0.0 + 3.8x + x2 = 0 + 1.6 3.8x + x2 = 0 + 1.6 Combine like terms: 0 + 1.6 = 1.6 3.8x + x2 = 1.6 The x term is 3.8x. Take half its coefficient (1.9). Square it (3.61) and add it to both sides. Add '3.61' to each side of the equation. 3.8x + 3.61 + x2 = 1.6 + 3.61 Reorder the terms: 3.61 + 3.8x + x2 = 1.6 + 3.61 Combine like terms: 1.6 + 3.61 = 5.21 3.61 + 3.8x + x2 = 5.21 Factor a perfect square on the left side: (x + 1.9)(x + 1.9) = 5.21 Calculate the square root of the right side: 2.282542442 Break this problem into two subproblems by setting (x + 1.9) equal to 2.282542442 and -2.282542442.Subproblem 1
x + 1.9 = 2.282542442 Simplifying x + 1.9 = 2.282542442 Reorder the terms: 1.9 + x = 2.282542442 Solving 1.9 + x = 2.282542442 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.9' to each side of the equation. 1.9 + -1.9 + x = 2.282542442 + -1.9 Combine like terms: 1.9 + -1.9 = 0.0 0.0 + x = 2.282542442 + -1.9 x = 2.282542442 + -1.9 Combine like terms: 2.282542442 + -1.9 = 0.382542442 x = 0.382542442 Simplifying x = 0.382542442Subproblem 2
x + 1.9 = -2.282542442 Simplifying x + 1.9 = -2.282542442 Reorder the terms: 1.9 + x = -2.282542442 Solving 1.9 + x = -2.282542442 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.9' to each side of the equation. 1.9 + -1.9 + x = -2.282542442 + -1.9 Combine like terms: 1.9 + -1.9 = 0.0 0.0 + x = -2.282542442 + -1.9 x = -2.282542442 + -1.9 Combine like terms: -2.282542442 + -1.9 = -4.182542442 x = -4.182542442 Simplifying x = -4.182542442Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.382542442, -4.182542442}
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