Question

Ajutor urgent va dau coroana

Answer 1

Răspuns:

a)[(1/2)^2+(-3/2)^2]*(-4/5)=[1/4+9/4]*(-4/5)=5/2*(-4/5)=-2

b)[(3/5)^2-(2/5)^2]:2/5=[9/25-4/25]*5/2=1/5*5/2=1/2