0=-r^2+48-2r

Solution for 0=-r^2+48-2r equation:

Simplifying
0 = -1r2 + 48 + -2r

Reorder the terms:
0 = 48 + -2r + -1r2

Solving
0 = 48 + -2r + -1r2

Solving for variable 'r'.

Combine like terms: 0 + -48 = -48
-48 + 2r + r2 = 48 + -2r + -1r2 + -48 + 2r + r2

Reorder the terms:
-48 + 2r + r2 = 48 + -48 + -2r + 2r + -1r2 + r2

Combine like terms: 48 + -48 = 0
-48 + 2r + r2 = 0 + -2r + 2r + -1r2 + r2
-48 + 2r + r2 = -2r + 2r + -1r2 + r2

Combine like terms: -2r + 2r = 0
-48 + 2r + r2 = 0 + -1r2 + r2
-48 + 2r + r2 = -1r2 + r2

Combine like terms: -1r2 + r2 = 0
-48 + 2r + r2 = 0

Factor a trinomial.
(-8 + -1r)(6 + -1r) = 0

Subproblem 1
Set the factor '(-8 + -1r)' equal to zero and attempt to solve:

Simplifying
-8 + -1r = 0

Solving
-8 + -1r = 0

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

Add '8' to each side of the equation.
-8 + 8 + -1r = 0 + 8

Combine like terms: -8 + 8 = 0
0 + -1r = 0 + 8
-1r = 0 + 8

Combine like terms: 0 + 8 = 8
-1r = 8

Divide each side by '-1'.
r = -8

Simplifying
r = -8
Subproblem 2
Set the factor '(6 + -1r)' equal to zero and attempt to solve:

Simplifying
6 + -1r = 0

Solving
6 + -1r = 0

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

Add '-6' to each side of the equation.
6 + -6 + -1r = 0 + -6

Combine like terms: 6 + -6 = 0
0 + -1r = 0 + -6
-1r = 0 + -6

Combine like terms: 0 + -6 = -6
-1r = -6

Divide each side by '-1'.
r = 6

Simplifying
r = 6
Solution
r = {-8, 6}