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Mathematics 13 Online
OpenStudy (anonymous):

find the product and conjugate of 3-4i

OpenStudy (ash2326):

Conjugate of a+bi is \[a-bi\] and conjugate of a-bi is \[a+bi\] Can you try to find the conjugate of 3-4i?

OpenStudy (anonymous):

hmm? 3+4i/9-16^2?

OpenStudy (ash2326):

3-4i ----> 3+4i

OpenStudy (anonymous):

yea i know that part but idk how to get the answer 25

geerky42 (geerky42):

(c + d)(c - d) = c² - d² (c + id)(c - id) = c² + d²

geerky42 (geerky42):

So (3 - 4i)(3 + 4i) would be 3² + 4², which is...

geerky42 (geerky42):

@JNaruto5796

OpenStudy (anonymous):

i get it :) ty

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