09-09-2014
Mathematics

Answered

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

Answer :

Аноним Аноним

09-09-2014

[tex] i^{2} [/tex]=-1 so 7

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09-09-2014

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 .

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