Question

If w = <-8, 15>, find ||w||.
7
17
23
sqr7
sqr23

Answer 1

\(w=\langle a, b\rangle \implies \ ||w|| = ||\langle a, b \rangle|| =\sqrt{a^2+b^2} \)

Answer 2

so -8^2+15^2

Answer 3

\(\sqrt{(-8)^2+15^2}=\)

Answer 4

i got 12.6

Answer 5

http://www.wolframalpha.com/input/?i=sqrt%288^2%2B15^2%29

Answer 6

remember that -8 * -8 is +64 (not -64)