9n^2-21n=-6

Solution for 9n^2-21n=-6 equation:

Simplifying
9n2 + -21n = -6

Reorder the terms:
-21n + 9n2 = -6

Solving
-21n + 9n2 = -6

Solving for variable 'n'.

Reorder the terms:
6 + -21n + 9n2 = -6 + 6

Combine like terms: -6 + 6 = 0
6 + -21n + 9n2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(2 + -7n + 3n2) = 0

Factor a trinomial.
3((1 + -3n)(2 + -1n)) = 0

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

Simplifying
1 + -3n = 0

Solving
1 + -3n = 0

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

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

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

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

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

Simplifying
n = 0.3333333333
Subproblem 2
Set the factor '(2 + -1n)' equal to zero and attempt to solve:

Simplifying
2 + -1n = 0

Solving
2 + -1n = 0

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

Add '-2' to each side of the equation.
2 + -2 + -1n = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -1n = 0 + -2
-1n = 0 + -2

Combine like terms: 0 + -2 = -2
-1n = -2

Divide each side by '-1'.
n = 2

Simplifying
n = 2
Solution
n = {0.3333333333, 2}