Question

PLEASE I NEED HELP

Which expression will equal a rational product even though it is multiplying an irrational number times another irrational number?


StartRoot 11 EndRoot times StartRoot 11 EndRoot

4.7813265 ellipsis times StartRoot 5 EndRoot

Pi times 3.785492 ellipsis

StartRoot 21 EndRoot times pi

Answer 1

On Ed.genuity the answer is A

Answer 2

(A)
`√(11) X √(11)`

Explanation:

In option A

`√(11) X √(11)\\=√(11X11)\\=√(11^2)\\=11`

Options B, C and D will give us an irrational product. Therefore the expression in Option A (
`√(11) X √(11)` ) will give a rational product.

Option A is the correct option.