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Mathematics 22 Online
OpenStudy (anonymous):

nothing

OpenStudy (compassionate):

FOIL.

OpenStudy (john_es):

The multiplication of complex numbers can be made as following, \[(−3 + 2i) • (2 + i)=(-3)\cdot 2+(-3)\cdot i+2i\cdot 2+2i\cdot i\]Now remember that \[i^2=-1\]And you can solve.

OpenStudy (anonymous):

-8+i

OpenStudy (anonymous):

-8+i

OpenStudy (anonymous):

@rbeckford134 i^2 is -1

OpenStudy (anonymous):

its -8+i im positive

OpenStudy (anonymous):

YES! Just realized my error!!!! hahaa.

OpenStudy (anonymous):

we are human its ok :)

OpenStudy (anonymous):

Lol. I was doing this way too fast. haha. -3 (2) = 06 -3 (i) = -3i 2i (2) = 4i 2i (i) = 2i^2 -6 - 3i + 4i + 2i^2 -6 - i + 2 ( 1) - ------- - 2(i) = 2 (-1) = -2 -6 - i +2 -6 - 2 - i -8 - i

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