-5n^2+10n-9=-4

Solution for -5n^2+10n-9=-4 equation:

Simplifying
-5n2 + 10n + -9 = -4

Reorder the terms:
-9 + 10n + -5n2 = -4

Solving
-9 + 10n + -5n2 = -4

Solving for variable 'n'.

Reorder the terms:
-9 + 4 + 10n + -5n2 = -4 + 4

Combine like terms: -9 + 4 = -5
-5 + 10n + -5n2 = -4 + 4

Combine like terms: -4 + 4 = 0
-5 + 10n + -5n2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(-1 + 2n + -1n2) = 0

Factor a trinomial.
5((-1 + n)(1 + -1n)) = 0

Ignore the factor 5.
Subproblem 1
Set the factor '(-1 + n)' equal to zero and attempt to solve:

Simplifying
-1 + n = 0

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

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

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

Simplifying
n = 1
Subproblem 2
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
Solution
n = {1, 1}