(5i)(-7i)=

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Solution for (5i)(-7i)= equation: 


Simplifying
(5i)(-7i) = 0

Remove parenthesis around (5i)
5i(-7i) = 0

Remove parenthesis around (-7i)
5i * -7i = 0

Reorder the terms for easier multiplication:
5 * -7i * i = 0

Multiply 5 * -7
-35i * i = 0

Multiply i * i
-35i2 = 0

Solving
-35i2 = 0

Solving for variable 'i'.

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

Divide each side by '-35'.
i2 = 0

Simplifying
i2 = 0

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

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