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Simplifying 5x2 + 15x = 14 Reorder the terms: 15x + 5x2 = 14 Solving 15x + 5x2 = 14 Solving for variable 'x'. Reorder the terms: -14 + 15x + 5x2 = 14 + -14 Combine like terms: 14 + -14 = 0 -14 + 15x + 5x2 = 0 Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -2.8 + 3x + x2 = 0 Move the constant term to the right: Add '2.8' to each side of the equation. -2.8 + 3x + 2.8 + x2 = 0 + 2.8 Reorder the terms: -2.8 + 2.8 + 3x + x2 = 0 + 2.8 Combine like terms: -2.8 + 2.8 = 0.0 0.0 + 3x + x2 = 0 + 2.8 3x + x2 = 0 + 2.8 Combine like terms: 0 + 2.8 = 2.8 3x + x2 = 2.8 The x term is 3x. Take half its coefficient (1.5). Square it (2.25) and add it to both sides. Add '2.25' to each side of the equation. 3x + 2.25 + x2 = 2.8 + 2.25 Reorder the terms: 2.25 + 3x + x2 = 2.8 + 2.25 Combine like terms: 2.8 + 2.25 = 5.05 2.25 + 3x + x2 = 5.05 Factor a perfect square on the left side: (x + 1.5)(x + 1.5) = 5.05 Calculate the square root of the right side: 2.247220505 Break this problem into two subproblems by setting (x + 1.5) equal to 2.247220505 and -2.247220505.Subproblem 1
x + 1.5 = 2.247220505 Simplifying x + 1.5 = 2.247220505 Reorder the terms: 1.5 + x = 2.247220505 Solving 1.5 + x = 2.247220505 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = 2.247220505 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 2.247220505 + -1.5 x = 2.247220505 + -1.5 Combine like terms: 2.247220505 + -1.5 = 0.747220505 x = 0.747220505 Simplifying x = 0.747220505Subproblem 2
x + 1.5 = -2.247220505 Simplifying x + 1.5 = -2.247220505 Reorder the terms: 1.5 + x = -2.247220505 Solving 1.5 + x = -2.247220505 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = -2.247220505 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -2.247220505 + -1.5 x = -2.247220505 + -1.5 Combine like terms: -2.247220505 + -1.5 = -3.747220505 x = -3.747220505 Simplifying x = -3.747220505Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.747220505, -3.747220505}
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