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is|dw:1349421000654:dw|

\[B=\left\{ x+x ^{2} ,1+x\right\}\] this is the basis

is it gonna be B=(0,0,0) ;(0,1,1);(0,1,0)
|dw:1349421351446:dw|
|dw:1349421421254:dw|

we need a matrix to make the change between the two basis

how to find that matrix

well i have some problem here .. how can B be a basis for some R3 if it has only two vectors

i think the firt vector is zero

it's given ?

but still i dont think it is a basis in this case

no

i might dont understand the question but B isnt a basis for P2

we cant generate for example "1" which is a valid P2

yes it is

how come ?

here i just showed you that it doesnt span P2

we have been told

so i dont know .. i dont understand
im sorry

ok in general how to anser this kind of questions

you have to find a matrix that converts between the two basis and then you only have to multiply

eg like wat i did

im sorry i couldnt help more but i really dont know how

ok thnx

hmm

@Coolsector i din't find the answer ,bul i'll try consult to my lecture