a^2-2a-360=0

Solution for a^2-2a-360=0 equation:

Simplifying
a2 + -2a + -360 = 0

Reorder the terms:
-360 + -2a + a2 = 0

Solving
-360 + -2a + a2 = 0

Solving for variable 'a'.

Factor a trinomial.
(-18 + -1a)(20 + -1a) = 0

Subproblem 1
Set the factor '(-18 + -1a)' equal to zero and attempt to solve:

Simplifying
-18 + -1a = 0

Solving
-18 + -1a = 0

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

Add '18' to each side of the equation.
-18 + 18 + -1a = 0 + 18

Combine like terms: -18 + 18 = 0
0 + -1a = 0 + 18
-1a = 0 + 18

Combine like terms: 0 + 18 = 18
-1a = 18

Divide each side by '-1'.
a = -18

Simplifying
a = -18
Subproblem 2
Set the factor '(20 + -1a)' equal to zero and attempt to solve:

Simplifying
20 + -1a = 0

Solving
20 + -1a = 0

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

Add '-20' to each side of the equation.
20 + -20 + -1a = 0 + -20

Combine like terms: 20 + -20 = 0
0 + -1a = 0 + -20
-1a = 0 + -20

Combine like terms: 0 + -20 = -20
-1a = -20

Divide each side by '-1'.
a = 20

Simplifying
a = 20
Solution
a = {-18, 20}