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Simplifying 2x * x + -15x + -2 = 0 Multiply x * x 2x2 + -15x + -2 = 0 Reorder the terms: -2 + -15x + 2x2 = 0 Solving -2 + -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'. -1 + -7.5x + x2 = 0 Move the constant term to the right: Add '1' to each side of the equation. -1 + -7.5x + 1 + x2 = 0 + 1 Reorder the terms: -1 + 1 + -7.5x + x2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -7.5x + x2 = 0 + 1 -7.5x + x2 = 0 + 1 Combine like terms: 0 + 1 = 1 -7.5x + x2 = 1 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 = 1 + 14.0625 Reorder the terms: 14.0625 + -7.5x + x2 = 1 + 14.0625 Combine like terms: 1 + 14.0625 = 15.0625 14.0625 + -7.5x + x2 = 15.0625 Factor a perfect square on the left side: (x + -3.75)(x + -3.75) = 15.0625 Calculate the square root of the right side: 3.881043674 Break this problem into two subproblems by setting (x + -3.75) equal to 3.881043674 and -3.881043674.Subproblem 1
x + -3.75 = 3.881043674 Simplifying x + -3.75 = 3.881043674 Reorder the terms: -3.75 + x = 3.881043674 Solving -3.75 + x = 3.881043674 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 = 3.881043674 + 3.75 Combine like terms: -3.75 + 3.75 = 0.00 0.00 + x = 3.881043674 + 3.75 x = 3.881043674 + 3.75 Combine like terms: 3.881043674 + 3.75 = 7.631043674 x = 7.631043674 Simplifying x = 7.631043674Subproblem 2
x + -3.75 = -3.881043674 Simplifying x + -3.75 = -3.881043674 Reorder the terms: -3.75 + x = -3.881043674 Solving -3.75 + x = -3.881043674 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 = -3.881043674 + 3.75 Combine like terms: -3.75 + 3.75 = 0.00 0.00 + x = -3.881043674 + 3.75 x = -3.881043674 + 3.75 Combine like terms: -3.881043674 + 3.75 = -0.131043674 x = -0.131043674 Simplifying x = -0.131043674Solution
The solution to the problem is based on the solutions from the subproblems. x = {7.631043674, -0.131043674}
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