-f-6=-f^2

Solution for -f-6=-f^2 equation:

Simplifying
-1f + -6 = -1f2

Reorder the terms:
-6 + -1f = -1f2

Solving
-6 + -1f = -1f2

Solving for variable 'f'.

Combine like terms: -1f2 + f2 = 0
-6 + -1f + f2 = 0

Factor a trinomial.
(-2 + -1f)(3 + -1f) = 0

Subproblem 1
Set the factor '(-2 + -1f)' equal to zero and attempt to solve:

Simplifying
-2 + -1f = 0

Solving
-2 + -1f = 0

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

Add '2' to each side of the equation.
-2 + 2 + -1f = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -1f = 0 + 2
-1f = 0 + 2

Combine like terms: 0 + 2 = 2
-1f = 2

Divide each side by '-1'.
f = -2

Simplifying
f = -2
Subproblem 2
Set the factor '(3 + -1f)' equal to zero and attempt to solve:

Simplifying
3 + -1f = 0

Solving
3 + -1f = 0

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

Add '-3' to each side of the equation.
3 + -3 + -1f = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -1f = 0 + -3
-1f = 0 + -3

Combine like terms: 0 + -3 = -3
-1f = -3

Divide each side by '-1'.
f = 3

Simplifying
f = 3
Solution
f = {-2, 3}