Question

Help.

Simplify the complex number 5+square root -54 and write it in correct notation

Answer 1

is it \[5+\sqrt {-54}?\]

Answer 2

that is what she has yes

Answer 3

first, you need to take out the negative... and that looks like this:\[5+i \sqrt{54}\] because i is the same as \[\sqrt{-1}\]

Answer 4

@Omgthatgirl are you there?..

Answer 5

Yea ok got it thanks

Answer 6

then you need to figure out how to finish simplifying the radical... do you know how to do that?

Answer 7

yea it's 5+8i

Answer 8

\(\bf 5+\sqrt{-54}\quad {\color{brown}{ 54\to 2\cdot 3\cdot 3\cdot 3\to 2\cdot 3\cdot 3^2 }}
\\ \quad \\
5+\sqrt{-54}\implies 5+\sqrt{-1\cdot 54}\implies 5+\sqrt{-1}\cdot \sqrt{54}
\\ \quad \\
5+\sqrt{-1}\cdot \sqrt{{\color{brown}{ 2\cdot 3\cdot 3^2 }}}\)

Answer 9

how is it 8?...

Answer 10

I don't know but that was the right answer

Answer 11

okayyyyyy did you was it really -54 or was it supposed to be -64?