2d^2-12d=12

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Solution for 2d^2-12d=12 equation:


Simplifying
2d2 + -12d = 12

Reorder the terms:
-12d + 2d2 = 12

Solving
-12d + 2d2 = 12

Solving for variable 'd'.

Reorder the terms:
-12 + -12d + 2d2 = 12 + -12

Combine like terms: 12 + -12 = 0
-12 + -12d + 2d2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-6 + -6d + d2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-6 + -6d + d2)' equal to zero and attempt to solve: Simplifying -6 + -6d + d2 = 0 Solving -6 + -6d + d2 = 0 Begin completing the square. Move the constant term to the right: Add '6' to each side of the equation. -6 + -6d + 6 + d2 = 0 + 6 Reorder the terms: -6 + 6 + -6d + d2 = 0 + 6 Combine like terms: -6 + 6 = 0 0 + -6d + d2 = 0 + 6 -6d + d2 = 0 + 6 Combine like terms: 0 + 6 = 6 -6d + d2 = 6 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 = 6 + 9 Reorder the terms: 9 + -6d + d2 = 6 + 9 Combine like terms: 6 + 9 = 15 9 + -6d + d2 = 15 Factor a perfect square on the left side: (d + -3)(d + -3) = 15 Calculate the square root of the right side: 3.872983346 Break this problem into two subproblems by setting (d + -3) equal to 3.872983346 and -3.872983346.

Subproblem 1

d + -3 = 3.872983346 Simplifying d + -3 = 3.872983346 Reorder the terms: -3 + d = 3.872983346 Solving -3 + d = 3.872983346 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 = 3.872983346 + 3 Combine like terms: -3 + 3 = 0 0 + d = 3.872983346 + 3 d = 3.872983346 + 3 Combine like terms: 3.872983346 + 3 = 6.872983346 d = 6.872983346 Simplifying d = 6.872983346

Subproblem 2

d + -3 = -3.872983346 Simplifying d + -3 = -3.872983346 Reorder the terms: -3 + d = -3.872983346 Solving -3 + d = -3.872983346 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 = -3.872983346 + 3 Combine like terms: -3 + 3 = 0 0 + d = -3.872983346 + 3 d = -3.872983346 + 3 Combine like terms: -3.872983346 + 3 = -0.872983346 d = -0.872983346 Simplifying d = -0.872983346

Solution

The solution to the problem is based on the solutions from the subproblems. d = {6.872983346, -0.872983346}

Solution

d = {6.872983346, -0.872983346}

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