a)[tex](10^{3} *10^{7} )^2:(25^2)^4= (10^{3+7})^2:25^8= (10^{10})^2:(5^2)^8=10^{20}:5^{16}= 2^{20}*5^{20}:5^{16}= 2^{20}*5^4[/tex]
b)[tex](15^4*15^6)^4:(27^3)^2= (15^{10})^4:27^6= 15^{40}:(3^3)^6= 5^{40}*3^{40}:3^{18}= 5^{40}*3^{22}[/tex]
De aici ar trebui sa te descurci.
