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Mathematics 21 Online
OpenStudy (kj4uts):

Write the product in standard form. (2-3i)(2+i)

OpenStudy (kj4uts):

zepdrix (zepdrix):

\[\Large\rm (2-3i)(2+i)=2(2)+2(i)+(-3i)2+(-3i)i\]So we start by doing the FOIL thingy. Then we simplify each term down, yah?

zepdrix (zepdrix):

Where you gettin stuck?

OpenStudy (kj4uts):

I know how do foil I just never did something with i in it

OpenStudy (anonymous):

just multiply it like normal

OpenStudy (anonymous):

and don't change the i into anything

zepdrix (zepdrix):

The only term that's going to seem weird is the last one :o

OpenStudy (kj4uts):

7-4i then?

zepdrix (zepdrix):

Ooo looks correct \c:/ good job!

OpenStudy (kj4uts):

ok thank you both for your time and help :)

OpenStudy (anonymous):

@KJ4UTS are you taking precalculus currently?

OpenStudy (kj4uts):

yes

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

because I am too

OpenStudy (anonymous):

lol

OpenStudy (kj4uts):

oh ok cool im in 12th grade

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