stiind ca x=10si y-z=29 calculati 5xy-5xz

Răspuns :

5xy-5xz=5x(y-z)

5x10x29=1450 .


x = 10   si y - z = 29

5 x y - 5 x z = 5 x ( y - z ) = 5 × 10 × 29 = 50 × 29 = 1 450