4j(5j)=

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Solution for 4j(5j)= equation: 


Simplifying
4j(5j) = 0

Remove parenthesis around (5j)
4j * 5j = 0

Reorder the terms for easier multiplication:
4 * 5j * j = 0

Multiply 4 * 5
20j * j = 0

Multiply j * j
20j2 = 0

Solving
20j2 = 0

Solving for variable 'j'.

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

Divide each side by '20'.
j2 = 0.0

Simplifying
j2 = 0.0

Take the square root of each side:
j = {0.0}

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