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Fie A=(2 1) .B=(1 -2).
3 2 3 5
Calculati A+B si A-B



Răspuns :

A + B= ( 2 1 ) + ( 1 -2) = (2+1 1+(-2)) = (3 -1)

( 3 2 ) (3 5) (3+3 2+5 ) (6 7)

A-B= A+(-B)= (2 1) + (-1 2) = (2-1 1+2) = (-1 3)

(3 2) (-3 -5) (3-3 2-5) (0 -3)