Question

the product (radical -8) (radical -2) is equal to
a) 4i
b) 4
c) -4
d) 3i radical2

Answer 1

it's 4

Answer 2

\[i \sqrt{8}*i \sqrt{2} = 2i \sqrt{2} * i \sqrt{2}= -2\sqrt{4}=-4\]

Answer 3

doesn't work that way, look it up

Answer 4

dockworker is right. thanks again :)

Answer 5

yw

Answer 6

come again?

Answer 7

c) -4
2 * 2 i^2 = -4