Question

Simplify the given expression.

square root of negative 10 end root times square root of negative 8

negative 4 square root 5
4 square root of 5
4 I square root of 5
negative 4 I square root of 5

Answer 1

\[\sqrt{-10} * \sqrt{-8}\]

Answer 2

start with\[\sqrt{10}i\times \sqrt{8}i\]

Answer 3

then since \(i^2=-1\) you have
\[-\sqrt{80}\] but you still have to write \(\sqrt{80}\) in simplest radical form
sort of like the other ones

Answer 4

you got that part?

Answer 5

not really..

Answer 6

i dont know where to start to write square root of 80 in rad form

Answer 7

you need to find a perfect square inside 80

Answer 8

16 x 5 = 80

Answer 9

just like you wrote \(27=9\times 3\) where \(9\) was the perfect square

Answer 10

got it!

Answer 11

\[4\sqrt{5}\]

Answer 12

yay!
don't forget the minus sign out front

Answer 13

\[-4\sqrt5\]

Answer 14

\[-4\sqrt{5}\]
is the answer?

Answer 15

oui