[tex]a = {2}^{5} \times {3}^{7} \times {6}^{3 } \\ a = {2}^{5} \times {3}^{7} \times {2}^{3} \times {3}^{3} \\ a = {2}^{8} \times {3}^{10} \\ a = { ({2}^{4} )}^{2} \times { ({3}^{5} )}^{2} \\ a = {( {2}^{4} \times {3}^{5}) }^{2} [/tex]
rezulta ca a este patrat perfect
