Question

\[(2-3\sqrt{-6})(-4+\sqrt{-6})\]

Answer 1

same idea as before
first write as
\[(2-3\sqrt{6}i)(-4+\sqrt{6}i)\] and then multiply

Answer 2

we can even do it the stupid "foil" way if you like it will work out the same

Answer 3

hang on i got the answer already but i have another question

Answer 4

my calc's sayin MATH ERROR!

Answer 5

ok
yeah because either your calculator is lousy or you don't know how to enter a complex number

Answer 6

\[(-4+\sqrt{-5})^{2}\]

Answer 7

if you try to type in
\[\sqrt{-6}\] it will tell you to go fish

Answer 8

\[(-4+\sqrt{5}i)^2=(-4+\sqrt{5}i)(-4+\sqrt{5}i)\]

Answer 9

lol, you guys are funny

Answer 10

we get
\[(-4\times -4-(\sqrt{5}\times \sqrt{5})+(-4\sqrt{5}-4\sqrt{5})i\]

Answer 11

Haha, yea.. It is saying me the same thing.

Answer 12

better known as
\[(16-5)+(-8\sqrt{5})i\] or
\[11-8\sqrt{5}i\]

Answer 13

steps clear?

Answer 14

you're such a lifesaver! you're preventing me from taking another year of algebra II right now

Answer 15

invoice is in the mail

Answer 16

conjugate of 8+4i ?