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Simplifying -16x2 + 40x + 5.5 = 0 Reorder the terms: 5.5 + 40x + -16x2 = 0 Solving 5.5 + 40x + -16x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -16 the coefficient of the squared term: Divide each side by '-16'. -0.34375 + -2.5x + x2 = 0 Move the constant term to the right: Add '0.34375' to each side of the equation. -0.34375 + -2.5x + 0.34375 + x2 = 0 + 0.34375 Reorder the terms: -0.34375 + 0.34375 + -2.5x + x2 = 0 + 0.34375 Combine like terms: -0.34375 + 0.34375 = 0.00000 0.00000 + -2.5x + x2 = 0 + 0.34375 -2.5x + x2 = 0 + 0.34375 Combine like terms: 0 + 0.34375 = 0.34375 -2.5x + x2 = 0.34375 The x term is -2.5x. Take half its coefficient (-1.25). Square it (1.5625) and add it to both sides. Add '1.5625' to each side of the equation. -2.5x + 1.5625 + x2 = 0.34375 + 1.5625 Reorder the terms: 1.5625 + -2.5x + x2 = 0.34375 + 1.5625 Combine like terms: 0.34375 + 1.5625 = 1.90625 1.5625 + -2.5x + x2 = 1.90625 Factor a perfect square on the left side: (x + -1.25)(x + -1.25) = 1.90625 Calculate the square root of the right side: 1.380670127 Break this problem into two subproblems by setting (x + -1.25) equal to 1.380670127 and -1.380670127.Subproblem 1
x + -1.25 = 1.380670127 Simplifying x + -1.25 = 1.380670127 Reorder the terms: -1.25 + x = 1.380670127 Solving -1.25 + x = 1.380670127 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = 1.380670127 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 1.380670127 + 1.25 x = 1.380670127 + 1.25 Combine like terms: 1.380670127 + 1.25 = 2.630670127 x = 2.630670127 Simplifying x = 2.630670127Subproblem 2
x + -1.25 = -1.380670127 Simplifying x + -1.25 = -1.380670127 Reorder the terms: -1.25 + x = -1.380670127 Solving -1.25 + x = -1.380670127 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = -1.380670127 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -1.380670127 + 1.25 x = -1.380670127 + 1.25 Combine like terms: -1.380670127 + 1.25 = -0.130670127 x = -0.130670127 Simplifying x = -0.130670127Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.630670127, -0.130670127}
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