anari98 anari98

26-03-2020
Mathematics

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Let r = 1 + 2i and s = 3 + 3i. Find r*s.

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ghanami ghanami

26-03-2020

Answer:

r×s= -3+9i

Step-by-step explanation:

hello :

Let r = 1 + 2i and s = 3 + 3i.

r×s=(1+2i)(3+3i)=3+3i+6i+6i² but : i²=-1

r×s= -3+9i

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