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Simplifying 4x2 + -15x + 3 = 0 Reorder the terms: 3 + -15x + 4x2 = 0 Solving 3 + -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'. 0.75 + -3.75x + x2 = 0 Move the constant term to the right: Add '-0.75' to each side of the equation. 0.75 + -3.75x + -0.75 + x2 = 0 + -0.75 Reorder the terms: 0.75 + -0.75 + -3.75x + x2 = 0 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + -3.75x + x2 = 0 + -0.75 -3.75x + x2 = 0 + -0.75 Combine like terms: 0 + -0.75 = -0.75 -3.75x + x2 = -0.75 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 = -0.75 + 3.515625 Reorder the terms: 3.515625 + -3.75x + x2 = -0.75 + 3.515625 Combine like terms: -0.75 + 3.515625 = 2.765625 3.515625 + -3.75x + x2 = 2.765625 Factor a perfect square on the left side: (x + -1.875)(x + -1.875) = 2.765625 Calculate the square root of the right side: 1.663016837 Break this problem into two subproblems by setting (x + -1.875) equal to 1.663016837 and -1.663016837.Subproblem 1
x + -1.875 = 1.663016837 Simplifying x + -1.875 = 1.663016837 Reorder the terms: -1.875 + x = 1.663016837 Solving -1.875 + x = 1.663016837 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 = 1.663016837 + 1.875 Combine like terms: -1.875 + 1.875 = 0.000 0.000 + x = 1.663016837 + 1.875 x = 1.663016837 + 1.875 Combine like terms: 1.663016837 + 1.875 = 3.538016837 x = 3.538016837 Simplifying x = 3.538016837Subproblem 2
x + -1.875 = -1.663016837 Simplifying x + -1.875 = -1.663016837 Reorder the terms: -1.875 + x = -1.663016837 Solving -1.875 + x = -1.663016837 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 = -1.663016837 + 1.875 Combine like terms: -1.875 + 1.875 = 0.000 0.000 + x = -1.663016837 + 1.875 x = -1.663016837 + 1.875 Combine like terms: -1.663016837 + 1.875 = 0.211983163 x = 0.211983163 Simplifying x = 0.211983163Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.538016837, 0.211983163}
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