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Simplifying
4k * k = 0
Multiply k * k
4k2 = 0
Solving
4k2 = 0
Solving for variable 'k'.
Move all terms containing k to the left, all other terms to the right.
Divide each side by '4'.
k2 = 0
Simplifying
k2 = 0
Take the square root of each side:
k = {0}
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