(d+2)3(3d+4)-10=16

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Solution for (d+2)3(3d+4)-10=16 equation:


Simplifying
(d + 2) * 3(3d + 4) + -10 = 16

Reorder the terms:
(2 + d) * 3(3d + 4) + -10 = 16

Reorder the terms:
(2 + d) * 3(4 + 3d) + -10 = 16

Reorder the terms for easier multiplication:
3(2 + d)(4 + 3d) + -10 = 16

Multiply (2 + d) * (4 + 3d)
3(2(4 + 3d) + d(4 + 3d)) + -10 = 16
3((4 * 2 + 3d * 2) + d(4 + 3d)) + -10 = 16
3((8 + 6d) + d(4 + 3d)) + -10 = 16
3(8 + 6d + (4 * d + 3d * d)) + -10 = 16
3(8 + 6d + (4d + 3d2)) + -10 = 16

Combine like terms: 6d + 4d = 10d
3(8 + 10d + 3d2) + -10 = 16
(8 * 3 + 10d * 3 + 3d2 * 3) + -10 = 16
(24 + 30d + 9d2) + -10 = 16

Reorder the terms:
24 + -10 + 30d + 9d2 = 16

Combine like terms: 24 + -10 = 14
14 + 30d + 9d2 = 16

Solving
14 + 30d + 9d2 = 16

Solving for variable 'd'.

Reorder the terms:
14 + -16 + 30d + 9d2 = 16 + -16

Combine like terms: 14 + -16 = -2
-2 + 30d + 9d2 = 16 + -16

Combine like terms: 16 + -16 = 0
-2 + 30d + 9d2 = 0

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

Divide each side by '9'.
-0.2222222222 + 3.333333333d + d2 = 0

Move the constant term to the right:

Add '0.2222222222' to each side of the equation.
-0.2222222222 + 3.333333333d + 0.2222222222 + d2 = 0 + 0.2222222222

Reorder the terms:
-0.2222222222 + 0.2222222222 + 3.333333333d + d2 = 0 + 0.2222222222

Combine like terms: -0.2222222222 + 0.2222222222 = 0.0000000000
0.0000000000 + 3.333333333d + d2 = 0 + 0.2222222222
3.333333333d + d2 = 0 + 0.2222222222

Combine like terms: 0 + 0.2222222222 = 0.2222222222
3.333333333d + d2 = 0.2222222222

The d term is 3.333333333d.  Take half its coefficient (1.666666667).
Square it (2.777777779) and add it to both sides.

Add '2.777777779' to each side of the equation.
3.333333333d + 2.777777779 + d2 = 0.2222222222 + 2.777777779

Reorder the terms:
2.777777779 + 3.333333333d + d2 = 0.2222222222 + 2.777777779

Combine like terms: 0.2222222222 + 2.777777779 = 3.0000000012
2.777777779 + 3.333333333d + d2 = 3.0000000012

Factor a perfect square on the left side:
(d + 1.666666667)(d + 1.666666667) = 3.0000000012

Calculate the square root of the right side: 1.732050808

Break this problem into two subproblems by setting 
(d + 1.666666667) equal to 1.732050808 and -1.732050808.

Subproblem 1

d + 1.666666667 = 1.732050808 Simplifying d + 1.666666667 = 1.732050808 Reorder the terms: 1.666666667 + d = 1.732050808 Solving 1.666666667 + d = 1.732050808 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '-1.666666667' to each side of the equation. 1.666666667 + -1.666666667 + d = 1.732050808 + -1.666666667 Combine like terms: 1.666666667 + -1.666666667 = 0.000000000 0.000000000 + d = 1.732050808 + -1.666666667 d = 1.732050808 + -1.666666667 Combine like terms: 1.732050808 + -1.666666667 = 0.065384141 d = 0.065384141 Simplifying d = 0.065384141

Subproblem 2

d + 1.666666667 = -1.732050808 Simplifying d + 1.666666667 = -1.732050808 Reorder the terms: 1.666666667 + d = -1.732050808 Solving 1.666666667 + d = -1.732050808 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '-1.666666667' to each side of the equation. 1.666666667 + -1.666666667 + d = -1.732050808 + -1.666666667 Combine like terms: 1.666666667 + -1.666666667 = 0.000000000 0.000000000 + d = -1.732050808 + -1.666666667 d = -1.732050808 + -1.666666667 Combine like terms: -1.732050808 + -1.666666667 = -3.398717475 d = -3.398717475 Simplifying d = -3.398717475

Solution

The solution to the problem is based on the solutions from the subproblems. d = {0.065384141, -3.398717475}

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