Question

Daca a=12•14 si b=48+31, calculați.
a)a•b= b)a•(a+b)= c)a•(a-b)= d)(a+b)•(a-b)
Va rog ajutatima

Answer 1

[tex]a=12*14=168 \\ b=48+31=79 \\ a) a*b=168*79=13272\\ b) a*(a+b)=168*(168+79)=168*247=41496\\ c) a*(a-b)=168*(168-79)=168*89=14952\\ d) (a+b)*(a-b)= (168+79)(168-79)=168^2-79^2=28224-6241\\=21983[/tex]