Question

Daca ab=95; ac-45, sa se calculeze:
a)a*(b+c)= b)a*(b-c)=

c)7a*(b+c)= d)10a*(b-c)=

Answer 1

a) a*(b+c)=ab+ac=95-45=50
b) a*(b-c)=ab-ac=95+45=140
c)7a*(b+c)=7ab+7ac=7*95+7*(-45)=665-315=350
d) 10a*(b-c)=10ab-10ac=950+450=1400