Question

√-10 * √-8

Answer 1

is this a complex number?

Answer 2

Yes

Answer 3

Complex? If you multiply those two you cancel out the negative.

Answer 4

i get -2*sqrt(10)*sqrt(2)

Answer 5

\[\sqrt{10}i\times \sqrt{8}i=\sqrt{80}i^2=-\sqrt{80}\] but you can rewrite \(\sqrt{80}=4\sqrt{5}\) so a "final answer" would be \(-4\sqrt{5}\)

Answer 6

careful with the sign
your answer should be negative

Answer 7

Thank you!

Answer 8

make sure to write or put \(-4\sqrt{5}\)
with a minus sign
yw

Answer 9

Why is it a minus sign?