2n^2-20n+15=-3

Solution for 2n^2-20n+15=-3 equation:

Simplifying
2n2 + -20n + 15 = -3

Reorder the terms:
15 + -20n + 2n2 = -3

Solving
15 + -20n + 2n2 = -3

Solving for variable 'n'.

Reorder the terms:
15 + 3 + -20n + 2n2 = -3 + 3

Combine like terms: 15 + 3 = 18
18 + -20n + 2n2 = -3 + 3

Combine like terms: -3 + 3 = 0
18 + -20n + 2n2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(9 + -10n + n2) = 0

Factor a trinomial.
2((1 + -1n)(9 + -1n)) = 0

Ignore the factor 2.
Subproblem 1
Set the factor '(1 + -1n)' equal to zero and attempt to solve:

Simplifying
1 + -1n = 0

Solving
1 + -1n = 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 + -1n = 0 + -1

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

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

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

Simplifying
n = 1
Subproblem 2
Set the factor '(9 + -1n)' equal to zero and attempt to solve:

Simplifying
9 + -1n = 0

Solving
9 + -1n = 0

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

Add '-9' to each side of the equation.
9 + -9 + -1n = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -1n = 0 + -9
-1n = 0 + -9

Combine like terms: 0 + -9 = -9
-1n = -9

Divide each side by '-1'.
n = 9

Simplifying
n = 9
Solution
n = {1, 9}