-9k(7k+7)=

Solution for -9k(7k+7)= equation:

Simplifying
-9k(7k + 7) = 0

Reorder the terms:
-9k(7 + 7k) = 0
(7 * -9k + 7k * -9k) = 0
(-63k + -63k2) = 0

Solving
-63k + -63k2 = 0

Solving for variable 'k'.

Factor out the Greatest Common Factor (GCF), '-63k'.
-63k(1 + k) = 0

Ignore the factor -63.
Subproblem 1
Set the factor 'k' equal to zero and attempt to solve:

Simplifying
k = 0

Solving
k = 0

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

Simplifying
k = 0
Subproblem 2
Set the factor '(1 + k)' equal to zero and attempt to solve:

Simplifying
1 + k = 0

Solving
1 + k = 0

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

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

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

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

Simplifying
k = -1
Solution
k = {0, -1}