3d^2-17d+20=0

Solution for 3d^2-17d+20=0 equation:

Simplifying
3d2 + -17d + 20 = 0

Reorder the terms:
20 + -17d + 3d2 = 0

Solving
20 + -17d + 3d2 = 0

Solving for variable 'd'.

Factor a trinomial.
(5 + -3d)(4 + -1d) = 0

Subproblem 1
Set the factor '(5 + -3d)' equal to zero and attempt to solve:

Simplifying
5 + -3d = 0

Solving
5 + -3d = 0

Move all terms containing d to the left, all other terms to the right.

Add '-5' to each side of the equation.
5 + -5 + -3d = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -3d = 0 + -5
-3d = 0 + -5

Combine like terms: 0 + -5 = -5
-3d = -5

Divide each side by '-3'.
d = 1.666666667

Simplifying
d = 1.666666667
Subproblem 2
Set the factor '(4 + -1d)' equal to zero and attempt to solve:

Simplifying
4 + -1d = 0

Solving
4 + -1d = 0

Move all terms containing d to the left, all other terms to the right.

Add '-4' to each side of the equation.
4 + -4 + -1d = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -1d = 0 + -4
-1d = 0 + -4

Combine like terms: 0 + -4 = -4
-1d = -4

Divide each side by '-1'.
d = 4

Simplifying
d = 4
Solution
d = {1.666666667, 4}