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What is (i)(-7i) ? Simplify

What is (i)(-7i) ? Simplify
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5 votes
What is (i)(-7i) ? Simplify

asked
User Wally Hartshorn
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7.5k points

2 Answers

4 votes

i^(2)=-1 so 7
answered
User Khaaliq
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7.6k points
3 votes
If ' i ' is just any old number, then (i) x (-7i) = -7 i² .

But if ' i ' am √(-1) , then (-7) x (i²) = (-7) x (-1) and that's +7 .
answered
User Chris SH
by
8.6k points
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