Question

6.Stiind ca: a) x(y+z)= -10, b)x=-3 si y+z=6, calculati 3xy + 3xz calculati xy+xz​

Answer 1

Răspuns:

a) 3xy+3xz=3x*(y+z) = 3x10=30

xy+xz=x(y+z)= 10

x(y+z)=10

b) 3x(y+z)= 3*3*6=54

x(y+z)= 3*6=18