Question

The question is in the attached file

Answer 1

C

Explanation:

using

x × y =
`√(x^2+y^2)` , then

2 × 4
`√(2)`

=
`\sqrt{2^2+(4√(2))^2 }`

=
`√(4+32)`

=
`√(36)`

= 6

Answer 2

`\textsf {Applying this formula :}`

`\mathsf {(x) * (y) =\sqrt{x^(2) + y^(2)}}`

`\textsf {Now take :}`

`\mathsf {x = 2}\\\mathsf {y = 4√(2)}`

`\mathsf {Solving :}`

`\implies \mathsf {\sqrt{(2)^(2) + (4√(2))^(2)}}`

`\implies \mathsf {√(4 + 32)}`

`\implies \mathsf {6}`