12.99D+14.24D^2=12.825

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Solution for 12.99D+14.24D^2=12.825 equation:


Simplifying
12.99D + 14.24D2 = 12.825

Solving
12.99D + 14.24D2 = 12.825

Solving for variable 'D'.

Reorder the terms:
-12.825 + 12.99D + 14.24D2 = 12.825 + -12.825

Combine like terms: 12.825 + -12.825 = 0.000
-12.825 + 12.99D + 14.24D2 = 0.000

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

Divide each side by '14.24'.
-0.9006320225 + 0.9122191011D + D2 = 0.0

Move the constant term to the right:

Add '0.9006320225' to each side of the equation.
-0.9006320225 + 0.9122191011D + 0.9006320225 + D2 = 0.0 + 0.9006320225

Reorder the terms:
-0.9006320225 + 0.9006320225 + 0.9122191011D + D2 = 0.0 + 0.9006320225

Combine like terms: -0.9006320225 + 0.9006320225 = 0.0000000000
0.0000000000 + 0.9122191011D + D2 = 0.0 + 0.9006320225
0.9122191011D + D2 = 0.0 + 0.9006320225

Combine like terms: 0.0 + 0.9006320225 = 0.9006320225
0.9122191011D + D2 = 0.9006320225

The D term is 0.9122191011D.  Take half its coefficient (0.4561095506).
Square it (0.2080359221) and add it to both sides.

Add '0.2080359221' to each side of the equation.
0.9122191011D + 0.2080359221 + D2 = 0.9006320225 + 0.2080359221

Reorder the terms:
0.2080359221 + 0.9122191011D + D2 = 0.9006320225 + 0.2080359221

Combine like terms: 0.9006320225 + 0.2080359221 = 1.1086679446
0.2080359221 + 0.9122191011D + D2 = 1.1086679446

Factor a perfect square on the left side:
(D + 0.4561095506)(D + 0.4561095506) = 1.1086679446

Calculate the square root of the right side: 1.05293302

Break this problem into two subproblems by setting 
(D + 0.4561095506) equal to 1.05293302 and -1.05293302.

Subproblem 1

D + 0.4561095506 = 1.05293302 Simplifying D + 0.4561095506 = 1.05293302 Reorder the terms: 0.4561095506 + D = 1.05293302 Solving 0.4561095506 + D = 1.05293302 Solving for variable 'D'. Move all terms containing D to the left, all other terms to the right. Add '-0.4561095506' to each side of the equation. 0.4561095506 + -0.4561095506 + D = 1.05293302 + -0.4561095506 Combine like terms: 0.4561095506 + -0.4561095506 = 0.0000000000 0.0000000000 + D = 1.05293302 + -0.4561095506 D = 1.05293302 + -0.4561095506 Combine like terms: 1.05293302 + -0.4561095506 = 0.5968234694 D = 0.5968234694 Simplifying D = 0.5968234694

Subproblem 2

D + 0.4561095506 = -1.05293302 Simplifying D + 0.4561095506 = -1.05293302 Reorder the terms: 0.4561095506 + D = -1.05293302 Solving 0.4561095506 + D = -1.05293302 Solving for variable 'D'. Move all terms containing D to the left, all other terms to the right. Add '-0.4561095506' to each side of the equation. 0.4561095506 + -0.4561095506 + D = -1.05293302 + -0.4561095506 Combine like terms: 0.4561095506 + -0.4561095506 = 0.0000000000 0.0000000000 + D = -1.05293302 + -0.4561095506 D = -1.05293302 + -0.4561095506 Combine like terms: -1.05293302 + -0.4561095506 = -1.5090425706 D = -1.5090425706 Simplifying D = -1.5090425706

Solution

The solution to the problem is based on the solutions from the subproblems. D = {0.5968234694, -1.5090425706}

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