(-3I)(7I)=0

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Solution for (-3I)(7I)=0 equation: 


Simplifying
(-3I)(7I) = 0

Remove parenthesis around (-3I)
-3I(7I) = 0

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

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

Multiply -3 * 7
-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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