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Mathematics 8 Online
OpenStudy (anonymous):

Find the product of the complex number and its conjugate. 3 + 3i

OpenStudy (kirbykirby):

do you know what the conjugate is?

OpenStudy (anonymous):

3 +3i I thought?

OpenStudy (kirbykirby):

just change the sign to find the conjugate: 3-3i

OpenStudy (anonymous):

is the answer 18?

OpenStudy (kirbykirby):

now you just simply do \((3+3i)(3-3i)\)

OpenStudy (kirbykirby):

yes :)

OpenStudy (anonymous):

thank you so much, I have some other problems that I have finished, can you check them for me?

OpenStudy (kirbykirby):

ok

OpenStudy (anonymous):

How do i write the expression in standard form 3/3-12i? And I got: 1/17 + 4i/17

OpenStudy (kirbykirby):

\[\frac{3}{3-12i}\] ?

OpenStudy (anonymous):

yes that is the question, and you have to write it in standard form.

OpenStudy (kirbykirby):

oh ok

OpenStudy (anonymous):

I got 1/17 + 4i/17

OpenStudy (kirbykirby):

yep

OpenStudy (anonymous):

alright, next is Write the sum or difference in the standard form a + bi. ( 4 - 2i) + ( 9 + 6i) And I got 13 + 4i

OpenStudy (kirbykirby):

yes

OpenStudy (anonymous):

( 9 + 5i)( 9 + 8i) And I got; 41 + 117i The possible answers are; 41 - 117i 40i2 + 117i + 81 121 - 27i 41 + 117i

OpenStudy (kirbykirby):

your answer is correct

OpenStudy (anonymous):

YOUR A FREAKING HERO

OpenStudy (kirbykirby):

lol your welcome :)

OpenStudy (anonymous):

I have 5 questions that I need help with if you know anyhting about the fundomental theorum of algebra

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