3d*d+9d-d-3=

Solution for 3d*d+9d-d-3= equation:

Simplifying
3d * d + 9d + -1d + -3 = 0

Multiply d * d
3d2 + 9d + -1d + -3 = 0

Reorder the terms:
-3 + 9d + -1d + 3d2 = 0

Combine like terms: 9d + -1d = 8d
-3 + 8d + 3d2 = 0

Solving
-3 + 8d + 3d2 = 0

Solving for variable 'd'.

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

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

Simplifying
-3 + -1d = 0

Solving
-3 + -1d = 0

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

Add '3' to each side of the equation.
-3 + 3 + -1d = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -1d = 0 + 3
-1d = 0 + 3

Combine like terms: 0 + 3 = 3
-1d = 3

Divide each side by '-1'.
d = -3

Simplifying
d = -3
Subproblem 2
Set the factor '(1 + -3d)' equal to zero and attempt to solve:

Simplifying
1 + -3d = 0

Solving
1 + -3d = 0

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

Add '-1' to each side of the equation.
1 + -1 + -3d = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -3d = 0 + -1
-3d = 0 + -1

Combine like terms: 0 + -1 = -1
-3d = -1

Divide each side by '-3'.
d = 0.3333333333

Simplifying
d = 0.3333333333
Solution
d = {-3, 0.3333333333}