3 years ago

What is the right answer for 9i x 2i?

1 answer:

3 0

The correct answer is: -18 .
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9i * 2i = 18 i² .
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" i " is an imaginary number equal to "√(-1) " .

" i² " = [√(-1)] ² = √(-1) * √(-1) = -1 .
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18 * i² = 18 * -1 = -18 .
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