Vectors

[vagrant rose]

Literally tells you how to do it at the top

[worldly solar]

i tried using that

if (a b) = a^2 + b^2, then (a) = a^2, then if you do a^2 you get (25 -4)

if you do 25 - -4 you get 29 which is correcet

but i thought it was 25 + -4 which gives you 21

idk why its -

[thorny plover]

(-2)^2 = 4

[worldly solar]

oh yeah, sorry my friend did the working out and i missed that