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

1 Answer
Apr 4, 2017

Answer:

# 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) #