(d-5)(3d-2)=2

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Solution for (d-5)(3d-2)=2 equation:


Simplifying
(d + -5)(3d + -2) = 2

Reorder the terms:
(-5 + d)(3d + -2) = 2

Reorder the terms:
(-5 + d)(-2 + 3d) = 2

Multiply (-5 + d) * (-2 + 3d)
(-5(-2 + 3d) + d(-2 + 3d)) = 2
((-2 * -5 + 3d * -5) + d(-2 + 3d)) = 2
((10 + -15d) + d(-2 + 3d)) = 2
(10 + -15d + (-2 * d + 3d * d)) = 2
(10 + -15d + (-2d + 3d2)) = 2

Combine like terms: -15d + -2d = -17d
(10 + -17d + 3d2) = 2

Solving
10 + -17d + 3d2 = 2

Solving for variable 'd'.

Reorder the terms:
10 + -2 + -17d + 3d2 = 2 + -2

Combine like terms: 10 + -2 = 8
8 + -17d + 3d2 = 2 + -2

Combine like terms: 2 + -2 = 0
8 + -17d + 3d2 = 0

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

Divide each side by '3'.
2.666666667 + -5.666666667d + d2 = 0

Move the constant term to the right:

Add '-2.666666667' to each side of the equation.
2.666666667 + -5.666666667d + -2.666666667 + d2 = 0 + -2.666666667

Reorder the terms:
2.666666667 + -2.666666667 + -5.666666667d + d2 = 0 + -2.666666667

Combine like terms: 2.666666667 + -2.666666667 = 0.000000000
0.000000000 + -5.666666667d + d2 = 0 + -2.666666667
-5.666666667d + d2 = 0 + -2.666666667

Combine like terms: 0 + -2.666666667 = -2.666666667
-5.666666667d + d2 = -2.666666667

The d term is -5.666666667d.  Take half its coefficient (-2.833333334).
Square it (8.027777782) and add it to both sides.

Add '8.027777782' to each side of the equation.
-5.666666667d + 8.027777782 + d2 = -2.666666667 + 8.027777782

Reorder the terms:
8.027777782 + -5.666666667d + d2 = -2.666666667 + 8.027777782

Combine like terms: -2.666666667 + 8.027777782 = 5.361111115
8.027777782 + -5.666666667d + d2 = 5.361111115

Factor a perfect square on the left side:
(d + -2.833333334)(d + -2.833333334) = 5.361111115

Calculate the square root of the right side: 2.315407332

Break this problem into two subproblems by setting 
(d + -2.833333334) equal to 2.315407332 and -2.315407332.

Subproblem 1

d + -2.833333334 = 2.315407332 Simplifying d + -2.833333334 = 2.315407332 Reorder the terms: -2.833333334 + d = 2.315407332 Solving -2.833333334 + d = 2.315407332 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '2.833333334' to each side of the equation. -2.833333334 + 2.833333334 + d = 2.315407332 + 2.833333334 Combine like terms: -2.833333334 + 2.833333334 = 0.000000000 0.000000000 + d = 2.315407332 + 2.833333334 d = 2.315407332 + 2.833333334 Combine like terms: 2.315407332 + 2.833333334 = 5.148740666 d = 5.148740666 Simplifying d = 5.148740666

Subproblem 2

d + -2.833333334 = -2.315407332 Simplifying d + -2.833333334 = -2.315407332 Reorder the terms: -2.833333334 + d = -2.315407332 Solving -2.833333334 + d = -2.315407332 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '2.833333334' to each side of the equation. -2.833333334 + 2.833333334 + d = -2.315407332 + 2.833333334 Combine like terms: -2.833333334 + 2.833333334 = 0.000000000 0.000000000 + d = -2.315407332 + 2.833333334 d = -2.315407332 + 2.833333334 Combine like terms: -2.315407332 + 2.833333334 = 0.517926002 d = 0.517926002 Simplifying d = 0.517926002

Solution

The solution to the problem is based on the solutions from the subproblems. d = {5.148740666, 0.517926002}

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