Question

What is `|| <-9, 3, 3 > - < 9, -2, 1 > ||`?

Answer 1

`sqrt(353)`

Explanation:

`|| <<-9, 3, 3 >> - << 9, -2, 1 >> ||`
`" " = || <<-9-9, 3-(-2), 3-1 >> ||`
`" " = || <<-18, 5, 2 >> ||`
`" " = sqrt(<<-18, 5, 2 >> * <<-18, 5, 2 >>)`
`" " = sqrt(-18^2+5^2+2^2)`
`" " = sqrt(324+25+4)`
`" " = sqrt(353)`