1.

(-i) (8+5i) =________________(a) 8+5i(b) -8-5i(c) -5-8i(d) 5-8iThis question was posed to me by my college professor while I was bunking the class.I'd like to ask this question from Complex Numbers-2 in division Complex Numbers and Quadratic Equations of Mathematics – Class 11

Answer»

The CORRECT option is (d) 5-8I

For explanation I would SAY: (-i) (8+5i) = -8i – 5 i^2

= -8i -5(-1) = 5-8i.



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