7i(3i)=

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Solution for 7i(3i)= equation: 


Simplifying
7i(3i) = 0

Remove parenthesis around (3i)
7i * 3i = 0

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

Multiply 7 * 3
21i * i = 0

Multiply i * i
21i2 = 0

Solving
21i2 = 0

Solving for variable 'i'.

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

Divide each side by '21'.
i2 = 0

Simplifying
i2 = 0

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

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