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Simplifying d2 + -1d + -5 = 0 Reorder the terms: -5 + -1d + d2 = 0 Solving -5 + -1d + d2 = 0 Solving for variable 'd'. Begin completing the square. Move the constant term to the right: Add '5' to each side of the equation. -5 + -1d + 5 + d2 = 0 + 5 Reorder the terms: -5 + 5 + -1d + d2 = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1d + d2 = 0 + 5 -1d + d2 = 0 + 5 Combine like terms: 0 + 5 = 5 -1d + d2 = 5 The d term is -1d. Take half its coefficient (-0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. -1d + 0.25 + d2 = 5 + 0.25 Reorder the terms: 0.25 + -1d + d2 = 5 + 0.25 Combine like terms: 5 + 0.25 = 5.25 0.25 + -1d + d2 = 5.25 Factor a perfect square on the left side: (d + -0.5)(d + -0.5) = 5.25 Calculate the square root of the right side: 2.291287847 Break this problem into two subproblems by setting (d + -0.5) equal to 2.291287847 and -2.291287847.Subproblem 1
d + -0.5 = 2.291287847 Simplifying d + -0.5 = 2.291287847 Reorder the terms: -0.5 + d = 2.291287847 Solving -0.5 + d = 2.291287847 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + d = 2.291287847 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + d = 2.291287847 + 0.5 d = 2.291287847 + 0.5 Combine like terms: 2.291287847 + 0.5 = 2.791287847 d = 2.791287847 Simplifying d = 2.791287847Subproblem 2
d + -0.5 = -2.291287847 Simplifying d + -0.5 = -2.291287847 Reorder the terms: -0.5 + d = -2.291287847 Solving -0.5 + d = -2.291287847 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + d = -2.291287847 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + d = -2.291287847 + 0.5 d = -2.291287847 + 0.5 Combine like terms: -2.291287847 + 0.5 = -1.791287847 d = -1.791287847 Simplifying d = -1.791287847Solution
The solution to the problem is based on the solutions from the subproblems. d = {2.791287847, -1.791287847}
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