(d^2)-6d=14

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Solution for (d^2)-6d=14 equation:


Simplifying
(d2) + -6d = 14
d2 + -6d = 14

Reorder the terms:
-6d + d2 = 14

Solving
-6d + d2 = 14

Solving for variable 'd'.

Reorder the terms:
-14 + -6d + d2 = 14 + -14

Combine like terms: 14 + -14 = 0
-14 + -6d + d2 = 0

Begin completing the square.

Move the constant term to the right:

Add '14' to each side of the equation.
-14 + -6d + 14 + d2 = 0 + 14

Reorder the terms:
-14 + 14 + -6d + d2 = 0 + 14

Combine like terms: -14 + 14 = 0
0 + -6d + d2 = 0 + 14
-6d + d2 = 0 + 14

Combine like terms: 0 + 14 = 14
-6d + d2 = 14

The d term is -6d.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6d + 9 + d2 = 14 + 9

Reorder the terms:
9 + -6d + d2 = 14 + 9

Combine like terms: 14 + 9 = 23
9 + -6d + d2 = 23

Factor a perfect square on the left side:
(d + -3)(d + -3) = 23

Calculate the square root of the right side: 4.795831523

Break this problem into two subproblems by setting 
(d + -3) equal to 4.795831523 and -4.795831523.

Subproblem 1

d + -3 = 4.795831523 Simplifying d + -3 = 4.795831523 Reorder the terms: -3 + d = 4.795831523 Solving -3 + d = 4.795831523 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + d = 4.795831523 + 3 Combine like terms: -3 + 3 = 0 0 + d = 4.795831523 + 3 d = 4.795831523 + 3 Combine like terms: 4.795831523 + 3 = 7.795831523 d = 7.795831523 Simplifying d = 7.795831523

Subproblem 2

d + -3 = -4.795831523 Simplifying d + -3 = -4.795831523 Reorder the terms: -3 + d = -4.795831523 Solving -3 + d = -4.795831523 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + d = -4.795831523 + 3 Combine like terms: -3 + 3 = 0 0 + d = -4.795831523 + 3 d = -4.795831523 + 3 Combine like terms: -4.795831523 + 3 = -1.795831523 d = -1.795831523 Simplifying d = -1.795831523

Solution

The solution to the problem is based on the solutions from the subproblems. d = {7.795831523, -1.795831523}

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