Question

Exercitiul E11 a) ...........

Answer 1

Răspuns:

AB=

(1 4)*(3 -1`)=

(0 5)(x y)=

(3+4x -1+4y)

(0*3+5x o*(-1)+5y)=

(3+4x -1+4y)

(5x 5y)+
(1 0)

(0 1)=

(3+4x+1 -1+4y+0)

(5x+0 5y+1)=

----------------------------

(4+4x 4y-1)

(5x 5y+1) Matricea 2

_____________________________________

(1 4)

(0, 5)+

(3 -1)

(x y)=

(1+3 4-1)

(0+x 5+y)=

----------------------

(4 3)

(x 5+y) Matricea 1
Egalezi matricea 1 cu matricea 2 si obtii un sistem de 2 ecuatii cu 2 necunoscute , il rezolvi si aflii x, y