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can someone help me with complex numbers and the quadratic equaion

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I'd love to - do you want help with anything specific, or just something broad?
i don't get multiplying and dividing complex numbers
You can simply use foil to multiply complex numbers together. When you divide it's a little bit more tricky, you need to multiply by the conjugate of the denominator. Maybe try watching this video :) This guy is good.

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Other answers:

my math teacher said i need to study quadratic equation before my test tomorrow It's not too difficult, and really easy to pickup :)
These are good videos about complex numbers: And this is for the quadratic formula:
on a recent quiz i got this problem wrong find the product: (3+6i)(4-7i) and i got 7-i.
You need to use foil, seems to me you added like-terms. You need to foil. You should get: 54+3i You should watch them videos.
\[12-21i+24i-42i^2\] \[12-21i+24i+42\] 54+3i \[i^2\] becomes -1.

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