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Simplifying 2x2 + 15x + 4 = 0 Reorder the terms: 4 + 15x + 2x2 = 0 Solving 4 + 15x + 2x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 2 + 7.5x + x2 = 0 Move the constant term to the right: Add '-2' to each side of the equation. 2 + 7.5x + -2 + x2 = 0 + -2 Reorder the terms: 2 + -2 + 7.5x + x2 = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 7.5x + x2 = 0 + -2 7.5x + x2 = 0 + -2 Combine like terms: 0 + -2 = -2 7.5x + x2 = -2 The x term is 7.5x. Take half its coefficient (3.75). Square it (14.0625) and add it to both sides. Add '14.0625' to each side of the equation. 7.5x + 14.0625 + x2 = -2 + 14.0625 Reorder the terms: 14.0625 + 7.5x + x2 = -2 + 14.0625 Combine like terms: -2 + 14.0625 = 12.0625 14.0625 + 7.5x + x2 = 12.0625 Factor a perfect square on the left side: (x + 3.75)(x + 3.75) = 12.0625 Calculate the square root of the right side: 3.473110997 Break this problem into two subproblems by setting (x + 3.75) equal to 3.473110997 and -3.473110997.Subproblem 1
x + 3.75 = 3.473110997 Simplifying x + 3.75 = 3.473110997 Reorder the terms: 3.75 + x = 3.473110997 Solving 3.75 + x = 3.473110997 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.75' to each side of the equation. 3.75 + -3.75 + x = 3.473110997 + -3.75 Combine like terms: 3.75 + -3.75 = 0.00 0.00 + x = 3.473110997 + -3.75 x = 3.473110997 + -3.75 Combine like terms: 3.473110997 + -3.75 = -0.276889003 x = -0.276889003 Simplifying x = -0.276889003Subproblem 2
x + 3.75 = -3.473110997 Simplifying x + 3.75 = -3.473110997 Reorder the terms: 3.75 + x = -3.473110997 Solving 3.75 + x = -3.473110997 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.75' to each side of the equation. 3.75 + -3.75 + x = -3.473110997 + -3.75 Combine like terms: 3.75 + -3.75 = 0.00 0.00 + x = -3.473110997 + -3.75 x = -3.473110997 + -3.75 Combine like terms: -3.473110997 + -3.75 = -7.223110997 x = -7.223110997 Simplifying x = -7.223110997Solution
The solution to the problem is based on the solutions from the subproblems. x = {-0.276889003, -7.223110997}
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