(n-5)(5n+5)=0

Solution for (n-5)(5n+5)=0 equation:

Simplifying
(n + -5)(5n + 5) = 0

Reorder the terms:
(-5 + n)(5n + 5) = 0

Reorder the terms:
(-5 + n)(5 + 5n) = 0

Multiply (-5 + n) * (5 + 5n)
(-5(5 + 5n) + n(5 + 5n)) = 0
((5 * -5 + 5n * -5) + n(5 + 5n)) = 0
((-25 + -25n) + n(5 + 5n)) = 0
(-25 + -25n + (5 * n + 5n * n)) = 0
(-25 + -25n + (5n + 5n2)) = 0

Combine like terms: -25n + 5n = -20n
(-25 + -20n + 5n2) = 0

Solving
-25 + -20n + 5n2 = 0

Solving for variable 'n'.

Factor out the Greatest Common Factor (GCF), '5'.
5(-5 + -4n + n2) = 0

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

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

Simplifying
5 + -1n = 0

Solving
5 + -1n = 0

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

Add '-5' to each side of the equation.
5 + -5 + -1n = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -1n = 0 + -5
-1n = 0 + -5

Combine like terms: 0 + -5 = -5
-1n = -5

Divide each side by '-1'.
n = 5

Simplifying
n = 5
Solution
n = {-1, 5}