Writing an equation relative to a new basis.

[jolly pawn]

Show me what you got so far

[iron lichen]

I've basically just written the matrix

( 1/3 2/3 )
( -1/3 1/3)

but thats it

[jolly pawn]

But that's wrong

[iron lichen]

oh wait i formatted it wrong

its actually

(1/ 3 -1/3
2/3 1/3

[jolly pawn]

No

Look at e2 the coefficient of e2 is -1/3 not 1/3

[iron lichen]

on the top right?

[jolly pawn]

-1/ 3 -1/3
2/3 1/3

Nvm

[iron lichen]

but e'2 = (2/3) + (1/3)e2

[jolly pawn]

I'm dumb

[iron lichen]

lol

np

[jolly pawn]

I think that's correct

[iron lichen]

oh so you turn x' y' into x y

ty