Question

Verificati proprietetea de distributivitate a inmultirii fata de adunare:
a* (-c)=a*b - a*c

a) a= 2/3 ; b= - 3/4 ; c= -5/6

Answer 1

a*(b-c)=2/3*[-3/4-(-5/6)]=2/3*(-9/12+10/12)=2/3*1/12=1/18

a*b - a*c=2/3*(-3/4)-2/3*(-5/6)=-1/2+5/9=-9/18+10/18=1/18