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OpenStudy (anonymous):
if 3i(2+5i)=x +6i, then x=?
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jimthompson5910 (jim_thompson5910):
Distribute to get 3i*2 + 3i*5i Then multiply that out. Tell me what you get.
OpenStudy (anonymous):
6i+15i^2
jimthompson5910 (jim_thompson5910):
now use the idea i^2 = -1
jimthompson5910 (jim_thompson5910):
6i+15i^2 6i+15(-1) 6i - 15 -15 + 6i I'm sure at this point you can see what x is
OpenStudy (anonymous):
yes, thank you very much for your help. Have a great day!
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jimthompson5910 (jim_thompson5910):
yw, you too
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