r^2+2r-360=

Solution for r^2+2r-360= equation:

Simplifying
r2 + 2r + -360 = 0

Reorder the terms:
-360 + 2r + r2 = 0

Solving
-360 + 2r + r2 = 0

Solving for variable 'r'.

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

Subproblem 1
Set the factor '(-20 + -1r)' equal to zero and attempt to solve:

Simplifying
-20 + -1r = 0

Solving
-20 + -1r = 0

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

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

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

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

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

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

Simplifying
18 + -1r = 0

Solving
18 + -1r = 0

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

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

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

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

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

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