m^2-8m-84=0

Solution for m^2-8m-84=0 equation:

Simplifying
m2 + -8m + -84 = 0

Reorder the terms:
-84 + -8m + m2 = 0

Solving
-84 + -8m + m2 = 0

Solving for variable 'm'.

Factor a trinomial.
(-6 + -1m)(14 + -1m) = 0

Subproblem 1
Set the factor '(-6 + -1m)' equal to zero and attempt to solve:

Simplifying
-6 + -1m = 0

Solving
-6 + -1m = 0

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

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

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

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

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

Simplifying
m = -6
Subproblem 2
Set the factor '(14 + -1m)' equal to zero and attempt to solve:

Simplifying
14 + -1m = 0

Solving
14 + -1m = 0

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

Add '-14' to each side of the equation.
14 + -14 + -1m = 0 + -14

Combine like terms: 14 + -14 = 0
0 + -1m = 0 + -14
-1m = 0 + -14

Combine like terms: 0 + -14 = -14
-1m = -14

Divide each side by '-1'.
m = 14

Simplifying
m = 14
Solution
m = {-6, 14}