7k^2-15k-18=0

Solution for 7k^2-15k-18=0 equation:

Simplifying
7k2 + -15k + -18 = 0

Reorder the terms:
-18 + -15k + 7k2 = 0

Solving
-18 + -15k + 7k2 = 0

Solving for variable 'k'.

Factor a trinomial.
(-6 + -7k)(3 + -1k) = 0

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

Simplifying
-6 + -7k = 0

Solving
-6 + -7k = 0

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

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

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

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

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

Simplifying
k = -0.8571428571
Subproblem 2
Set the factor '(3 + -1k)' equal to zero and attempt to solve:

Simplifying
3 + -1k = 0

Solving
3 + -1k = 0

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

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

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

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

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

Simplifying
k = 3
Solution
k = {-0.8571428571, 3}