d^2+24d+144=8

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Solution for d^2+24d+144=8 equation:


Simplifying
d2 + 24d + 144 = 8

Reorder the terms:
144 + 24d + d2 = 8

Solving
144 + 24d + d2 = 8

Solving for variable 'd'.

Reorder the terms:
144 + -8 + 24d + d2 = 8 + -8

Combine like terms: 144 + -8 = 136
136 + 24d + d2 = 8 + -8

Combine like terms: 8 + -8 = 0
136 + 24d + d2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-136' to each side of the equation.
136 + 24d + -136 + d2 = 0 + -136

Reorder the terms:
136 + -136 + 24d + d2 = 0 + -136

Combine like terms: 136 + -136 = 0
0 + 24d + d2 = 0 + -136
24d + d2 = 0 + -136

Combine like terms: 0 + -136 = -136
24d + d2 = -136

The d term is 24d.  Take half its coefficient (12).
Square it (144) and add it to both sides.

Add '144' to each side of the equation.
24d + 144 + d2 = -136 + 144

Reorder the terms:
144 + 24d + d2 = -136 + 144

Combine like terms: -136 + 144 = 8
144 + 24d + d2 = 8

Factor a perfect square on the left side:
(d + 12)(d + 12) = 8

Calculate the square root of the right side: 2.828427125

Break this problem into two subproblems by setting 
(d + 12) equal to 2.828427125 and -2.828427125.

Subproblem 1

d + 12 = 2.828427125 Simplifying d + 12 = 2.828427125 Reorder the terms: 12 + d = 2.828427125 Solving 12 + d = 2.828427125 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + d = 2.828427125 + -12 Combine like terms: 12 + -12 = 0 0 + d = 2.828427125 + -12 d = 2.828427125 + -12 Combine like terms: 2.828427125 + -12 = -9.171572875 d = -9.171572875 Simplifying d = -9.171572875

Subproblem 2

d + 12 = -2.828427125 Simplifying d + 12 = -2.828427125 Reorder the terms: 12 + d = -2.828427125 Solving 12 + d = -2.828427125 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + d = -2.828427125 + -12 Combine like terms: 12 + -12 = 0 0 + d = -2.828427125 + -12 d = -2.828427125 + -12 Combine like terms: -2.828427125 + -12 = -14.828427125 d = -14.828427125 Simplifying d = -14.828427125

Solution

The solution to the problem is based on the solutions from the subproblems. d = {-9.171572875, -14.828427125}

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