3i(-7i)=

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


Simplifying
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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