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Simplifying 4x2 + 15x + -6 = 0 Reorder the terms: -6 + 15x + 4x2 = 0 Solving -6 + 15x + 4x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -1.5 + 3.75x + x2 = 0 Move the constant term to the right: Add '1.5' to each side of the equation. -1.5 + 3.75x + 1.5 + x2 = 0 + 1.5 Reorder the terms: -1.5 + 1.5 + 3.75x + x2 = 0 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + 3.75x + x2 = 0 + 1.5 3.75x + x2 = 0 + 1.5 Combine like terms: 0 + 1.5 = 1.5 3.75x + x2 = 1.5 The x term is 3.75x. Take half its coefficient (1.875). Square it (3.515625) and add it to both sides. Add '3.515625' to each side of the equation. 3.75x + 3.515625 + x2 = 1.5 + 3.515625 Reorder the terms: 3.515625 + 3.75x + x2 = 1.5 + 3.515625 Combine like terms: 1.5 + 3.515625 = 5.015625 3.515625 + 3.75x + x2 = 5.015625 Factor a perfect square on the left side: (x + 1.875)(x + 1.875) = 5.015625 Calculate the square root of the right side: 2.239559108 Break this problem into two subproblems by setting (x + 1.875) equal to 2.239559108 and -2.239559108.Subproblem 1
x + 1.875 = 2.239559108 Simplifying x + 1.875 = 2.239559108 Reorder the terms: 1.875 + x = 2.239559108 Solving 1.875 + x = 2.239559108 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.875' to each side of the equation. 1.875 + -1.875 + x = 2.239559108 + -1.875 Combine like terms: 1.875 + -1.875 = 0.000 0.000 + x = 2.239559108 + -1.875 x = 2.239559108 + -1.875 Combine like terms: 2.239559108 + -1.875 = 0.364559108 x = 0.364559108 Simplifying x = 0.364559108Subproblem 2
x + 1.875 = -2.239559108 Simplifying x + 1.875 = -2.239559108 Reorder the terms: 1.875 + x = -2.239559108 Solving 1.875 + x = -2.239559108 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.875' to each side of the equation. 1.875 + -1.875 + x = -2.239559108 + -1.875 Combine like terms: 1.875 + -1.875 = 0.000 0.000 + x = -2.239559108 + -1.875 x = -2.239559108 + -1.875 Combine like terms: -2.239559108 + -1.875 = -4.114559108 x = -4.114559108 Simplifying x = -4.114559108Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.364559108, -4.114559108}
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