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Simplifying 5x2 + 14x + -15 = 0 Reorder the terms: -15 + 14x + 5x2 = 0 Solving -15 + 14x + 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'. -3 + 2.8x + x2 = 0 Move the constant term to the right: Add '3' to each side of the equation. -3 + 2.8x + 3 + x2 = 0 + 3 Reorder the terms: -3 + 3 + 2.8x + x2 = 0 + 3 Combine like terms: -3 + 3 = 0 0 + 2.8x + x2 = 0 + 3 2.8x + x2 = 0 + 3 Combine like terms: 0 + 3 = 3 2.8x + x2 = 3 The x term is 2.8x. Take half its coefficient (1.4). Square it (1.96) and add it to both sides. Add '1.96' to each side of the equation. 2.8x + 1.96 + x2 = 3 + 1.96 Reorder the terms: 1.96 + 2.8x + x2 = 3 + 1.96 Combine like terms: 3 + 1.96 = 4.96 1.96 + 2.8x + x2 = 4.96 Factor a perfect square on the left side: (x + 1.4)(x + 1.4) = 4.96 Calculate the square root of the right side: 2.227105745 Break this problem into two subproblems by setting (x + 1.4) equal to 2.227105745 and -2.227105745.Subproblem 1
x + 1.4 = 2.227105745 Simplifying x + 1.4 = 2.227105745 Reorder the terms: 1.4 + x = 2.227105745 Solving 1.4 + x = 2.227105745 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.4' to each side of the equation. 1.4 + -1.4 + x = 2.227105745 + -1.4 Combine like terms: 1.4 + -1.4 = 0.0 0.0 + x = 2.227105745 + -1.4 x = 2.227105745 + -1.4 Combine like terms: 2.227105745 + -1.4 = 0.827105745 x = 0.827105745 Simplifying x = 0.827105745Subproblem 2
x + 1.4 = -2.227105745 Simplifying x + 1.4 = -2.227105745 Reorder the terms: 1.4 + x = -2.227105745 Solving 1.4 + x = -2.227105745 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.4' to each side of the equation. 1.4 + -1.4 + x = -2.227105745 + -1.4 Combine like terms: 1.4 + -1.4 = 0.0 0.0 + x = -2.227105745 + -1.4 x = -2.227105745 + -1.4 Combine like terms: -2.227105745 + -1.4 = -3.627105745 x = -3.627105745 Simplifying x = -3.627105745Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.827105745, -3.627105745}
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