11d*9d-2=5d+28

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Solution for 11d*9d-2=5d+28 equation:


Simplifying
11d * 9d + -2 = 5d + 28

Reorder the terms for easier multiplication:
11 * 9d * d + -2 = 5d + 28

Multiply 11 * 9
99d * d + -2 = 5d + 28

Multiply d * d
99d2 + -2 = 5d + 28

Reorder the terms:
-2 + 99d2 = 5d + 28

Reorder the terms:
-2 + 99d2 = 28 + 5d

Solving
-2 + 99d2 = 28 + 5d

Solving for variable 'd'.

Reorder the terms:
-2 + -28 + -5d + 99d2 = 28 + 5d + -28 + -5d

Combine like terms: -2 + -28 = -30
-30 + -5d + 99d2 = 28 + 5d + -28 + -5d

Reorder the terms:
-30 + -5d + 99d2 = 28 + -28 + 5d + -5d

Combine like terms: 28 + -28 = 0
-30 + -5d + 99d2 = 0 + 5d + -5d
-30 + -5d + 99d2 = 5d + -5d

Combine like terms: 5d + -5d = 0
-30 + -5d + 99d2 = 0

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

Divide each side by '99'.
-0.303030303 + -0.05050505051d + d2 = 0

Move the constant term to the right:

Add '0.303030303' to each side of the equation.
-0.303030303 + -0.05050505051d + 0.303030303 + d2 = 0 + 0.303030303

Reorder the terms:
-0.303030303 + 0.303030303 + -0.05050505051d + d2 = 0 + 0.303030303

Combine like terms: -0.303030303 + 0.303030303 = 0.000000000
0.000000000 + -0.05050505051d + d2 = 0 + 0.303030303
-0.05050505051d + d2 = 0 + 0.303030303

Combine like terms: 0 + 0.303030303 = 0.303030303
-0.05050505051d + d2 = 0.303030303

The d term is -0.05050505051d.  Take half its coefficient (-0.02525252526).
Square it (0.0006376900320) and add it to both sides.

Add '0.0006376900320' to each side of the equation.
-0.05050505051d + 0.0006376900320 + d2 = 0.303030303 + 0.0006376900320

Reorder the terms:
0.0006376900320 + -0.05050505051d + d2 = 0.303030303 + 0.0006376900320

Combine like terms: 0.303030303 + 0.0006376900320 = 0.303667993032
0.0006376900320 + -0.05050505051d + d2 = 0.303667993032

Factor a perfect square on the left side:
(d + -0.02525252526)(d + -0.02525252526) = 0.303667993032

Calculate the square root of the right side: 0.551060789

Break this problem into two subproblems by setting 
(d + -0.02525252526) equal to 0.551060789 and -0.551060789.

Subproblem 1

d + -0.02525252526 = 0.551060789 Simplifying d + -0.02525252526 = 0.551060789 Reorder the terms: -0.02525252526 + d = 0.551060789 Solving -0.02525252526 + d = 0.551060789 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '0.02525252526' to each side of the equation. -0.02525252526 + 0.02525252526 + d = 0.551060789 + 0.02525252526 Combine like terms: -0.02525252526 + 0.02525252526 = 0.00000000000 0.00000000000 + d = 0.551060789 + 0.02525252526 d = 0.551060789 + 0.02525252526 Combine like terms: 0.551060789 + 0.02525252526 = 0.57631331426 d = 0.57631331426 Simplifying d = 0.57631331426

Subproblem 2

d + -0.02525252526 = -0.551060789 Simplifying d + -0.02525252526 = -0.551060789 Reorder the terms: -0.02525252526 + d = -0.551060789 Solving -0.02525252526 + d = -0.551060789 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '0.02525252526' to each side of the equation. -0.02525252526 + 0.02525252526 + d = -0.551060789 + 0.02525252526 Combine like terms: -0.02525252526 + 0.02525252526 = 0.00000000000 0.00000000000 + d = -0.551060789 + 0.02525252526 d = -0.551060789 + 0.02525252526 Combine like terms: -0.551060789 + 0.02525252526 = -0.52580826374 d = -0.52580826374 Simplifying d = -0.52580826374

Solution

The solution to the problem is based on the solutions from the subproblems. d = {0.57631331426, -0.52580826374}

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