Seudónimo
Seudónimo
09-09-2014
Mathematics
contestada
What is (i)(-7i) ? Simplify
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Аноним
Аноним
09-09-2014
[tex] i^{2} [/tex]=-1 so 7
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AL2006
AL2006
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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