Respuesta :

Answer:

2 sqrt(30)

Step-by-step explanation:

We want to find the norm of the matrix

( -2  6

 4   8)

Take the square root of the sum of the squares

sqrt(   (-2) ^2 + 6^2  + 4^2 + 8^2)

sqrt( 4+36+16+64)

sqrt( 120)

sqrt( 4*30)

2 sqrt(30)