7k(-3k)=

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Solution for 7k(-3k)= equation: 


Simplifying
7k(-3k) = 0

Remove parenthesis around (-3k)
7k * -3k = 0

Reorder the terms for easier multiplication:
7 * -3k * k = 0

Multiply 7 * -3
-21k * k = 0

Multiply k * k
-21k2 = 0

Solving
-21k2 = 0

Solving for variable 'k'.

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

Divide each side by '-21'.
k2 = 0

Simplifying
k2 = 0

Take the square root of each side:
k = {0}

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