d(d-8)-5=9(d+2)+1

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Solution for d(d-8)-5=9(d+2)+1 equation:


Simplifying
d(d + -8) + -5 = 9(d + 2) + 1

Reorder the terms:
d(-8 + d) + -5 = 9(d + 2) + 1
(-8 * d + d * d) + -5 = 9(d + 2) + 1
(-8d + d2) + -5 = 9(d + 2) + 1

Reorder the terms:
-5 + -8d + d2 = 9(d + 2) + 1

Reorder the terms:
-5 + -8d + d2 = 9(2 + d) + 1
-5 + -8d + d2 = (2 * 9 + d * 9) + 1
-5 + -8d + d2 = (18 + 9d) + 1

Reorder the terms:
-5 + -8d + d2 = 18 + 1 + 9d

Combine like terms: 18 + 1 = 19
-5 + -8d + d2 = 19 + 9d

Solving
-5 + -8d + d2 = 19 + 9d

Solving for variable 'd'.

Reorder the terms:
-5 + -19 + -8d + -9d + d2 = 19 + 9d + -19 + -9d

Combine like terms: -5 + -19 = -24
-24 + -8d + -9d + d2 = 19 + 9d + -19 + -9d

Combine like terms: -8d + -9d = -17d
-24 + -17d + d2 = 19 + 9d + -19 + -9d

Reorder the terms:
-24 + -17d + d2 = 19 + -19 + 9d + -9d

Combine like terms: 19 + -19 = 0
-24 + -17d + d2 = 0 + 9d + -9d
-24 + -17d + d2 = 9d + -9d

Combine like terms: 9d + -9d = 0
-24 + -17d + d2 = 0

Begin completing the square.

Move the constant term to the right:

Add '24' to each side of the equation.
-24 + -17d + 24 + d2 = 0 + 24

Reorder the terms:
-24 + 24 + -17d + d2 = 0 + 24

Combine like terms: -24 + 24 = 0
0 + -17d + d2 = 0 + 24
-17d + d2 = 0 + 24

Combine like terms: 0 + 24 = 24
-17d + d2 = 24

The d term is -17d.  Take half its coefficient (-8.5).
Square it (72.25) and add it to both sides.

Add '72.25' to each side of the equation.
-17d + 72.25 + d2 = 24 + 72.25

Reorder the terms:
72.25 + -17d + d2 = 24 + 72.25

Combine like terms: 24 + 72.25 = 96.25
72.25 + -17d + d2 = 96.25

Factor a perfect square on the left side:
(d + -8.5)(d + -8.5) = 96.25

Calculate the square root of the right side: 9.810708435

Break this problem into two subproblems by setting 
(d + -8.5) equal to 9.810708435 and -9.810708435.

Subproblem 1

d + -8.5 = 9.810708435 Simplifying d + -8.5 = 9.810708435 Reorder the terms: -8.5 + d = 9.810708435 Solving -8.5 + d = 9.810708435 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '8.5' to each side of the equation. -8.5 + 8.5 + d = 9.810708435 + 8.5 Combine like terms: -8.5 + 8.5 = 0.0 0.0 + d = 9.810708435 + 8.5 d = 9.810708435 + 8.5 Combine like terms: 9.810708435 + 8.5 = 18.310708435 d = 18.310708435 Simplifying d = 18.310708435

Subproblem 2

d + -8.5 = -9.810708435 Simplifying d + -8.5 = -9.810708435 Reorder the terms: -8.5 + d = -9.810708435 Solving -8.5 + d = -9.810708435 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '8.5' to each side of the equation. -8.5 + 8.5 + d = -9.810708435 + 8.5 Combine like terms: -8.5 + 8.5 = 0.0 0.0 + d = -9.810708435 + 8.5 d = -9.810708435 + 8.5 Combine like terms: -9.810708435 + 8.5 = -1.310708435 d = -1.310708435 Simplifying d = -1.310708435

Solution

The solution to the problem is based on the solutions from the subproblems. d = {18.310708435, -1.310708435}

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