[tex]\displaystyle\bf\\\textbf{Daca numarul de sub radical nu este patrat perfect,}\\ \textbf{atunci il descompunemintr-un produs de 2 factori,}\\\textbf{din care un factor este patrat perfect care va fi scos de sub radical}\\\textbf{dupa ce se va extrage radical din el.}[/tex]
.
[tex]\displaystyle\bf\\\sqrt{72}=\sqrt{36\times2}=\sqrt{6^2\times2}=\sqrt{6^2}\times\sqrt{2}=\boxed{\bf6\sqrt{2}}\\\\\sqrt{98}=\sqrt{49\times2}=\sqrt{7^2\times2}=\sqrt{7^2}\times\sqrt{2}=\boxed{\bf7\sqrt{2}}\\\\\sqrt{162}=\sqrt{81\times2}=\sqrt{9^2\times2}=\sqrt{9^2}\times\sqrt{2}=\boxed{\bf9\sqrt{2}}\\\\\sqrt{192}=\sqrt{64\times3}=\sqrt{8^2\times3}=\sqrt{8^2}\times\sqrt{3}=\boxed{\bf8\sqrt{3}}[/tex]
