42m^2-13m-42=0

Solution for 42m^2-13m-42=0 equation:

Simplifying
42m2 + -13m + -42 = 0

Reorder the terms:
-42 + -13m + 42m2 = 0

Solving
-42 + -13m + 42m2 = 0

Solving for variable 'm'.

Factor a trinomial.
(-6 + -7m)(7 + -6m) = 0

Subproblem 1
Set the factor '(-6 + -7m)' equal to zero and attempt to solve:

Simplifying
-6 + -7m = 0

Solving
-6 + -7m = 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 + -7m = 0 + 6

Combine like terms: -6 + 6 = 0
0 + -7m = 0 + 6
-7m = 0 + 6

Combine like terms: 0 + 6 = 6
-7m = 6

Divide each side by '-7'.
m = -0.8571428571

Simplifying
m = -0.8571428571
Subproblem 2
Set the factor '(7 + -6m)' equal to zero and attempt to solve:

Simplifying
7 + -6m = 0

Solving
7 + -6m = 0

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

Add '-7' to each side of the equation.
7 + -7 + -6m = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -6m = 0 + -7
-6m = 0 + -7

Combine like terms: 0 + -7 = -7
-6m = -7

Divide each side by '-6'.
m = 1.166666667

Simplifying
m = 1.166666667
Solution
m = {-0.8571428571, 1.166666667}