1100d-d^2=31692.94

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Solution for 1100d-d^2=31692.94 equation:


Simplifying
1100d + -1d2 = 31692.94

Solving
1100d + -1d2 = 31692.94

Solving for variable 'd'.

Reorder the terms:
-31692.94 + 1100d + -1d2 = 31692.94 + -31692.94

Combine like terms: 31692.94 + -31692.94 = 0.00
-31692.94 + 1100d + -1d2 = 0.00

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
31692.94 + -1100d + d2 = 0.00

Move the constant term to the right:

Add '-31692.94' to each side of the equation.
31692.94 + -1100d + -31692.94 + d2 = 0.00 + -31692.94

Reorder the terms:
31692.94 + -31692.94 + -1100d + d2 = 0.00 + -31692.94

Combine like terms: 31692.94 + -31692.94 = 0.00
0.00 + -1100d + d2 = 0.00 + -31692.94
-1100d + d2 = 0.00 + -31692.94

Combine like terms: 0.00 + -31692.94 = -31692.94
-1100d + d2 = -31692.94

The d term is -1100d.  Take half its coefficient (-550).
Square it (302500) and add it to both sides.

Add '302500' to each side of the equation.
-1100d + 302500 + d2 = -31692.94 + 302500

Reorder the terms:
302500 + -1100d + d2 = -31692.94 + 302500

Combine like terms: -31692.94 + 302500 = 270807.06
302500 + -1100d + d2 = 270807.06

Factor a perfect square on the left side:
(d + -550)(d + -550) = 270807.06

Calculate the square root of the right side: 520.391256652

Break this problem into two subproblems by setting 
(d + -550) equal to 520.391256652 and -520.391256652.

Subproblem 1

d + -550 = 520.391256652 Simplifying d + -550 = 520.391256652 Reorder the terms: -550 + d = 520.391256652 Solving -550 + d = 520.391256652 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '550' to each side of the equation. -550 + 550 + d = 520.391256652 + 550 Combine like terms: -550 + 550 = 0 0 + d = 520.391256652 + 550 d = 520.391256652 + 550 Combine like terms: 520.391256652 + 550 = 1070.391256652 d = 1070.391256652 Simplifying d = 1070.391256652

Subproblem 2

d + -550 = -520.391256652 Simplifying d + -550 = -520.391256652 Reorder the terms: -550 + d = -520.391256652 Solving -550 + d = -520.391256652 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '550' to each side of the equation. -550 + 550 + d = -520.391256652 + 550 Combine like terms: -550 + 550 = 0 0 + d = -520.391256652 + 550 d = -520.391256652 + 550 Combine like terms: -520.391256652 + 550 = 29.608743348 d = 29.608743348 Simplifying d = 29.608743348

Solution

The solution to the problem is based on the solutions from the subproblems. d = {1070.391256652, 29.608743348}

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