Răspuns:
[tex]26xy - 39z = 13(2xy - 3z)[/tex]
[tex] - 121 {x}^{2}y + 11 {y}^{2} = 11y(11 {x}^{2} + y)[/tex]
[tex]12.5 {a}^{2} {b}^{2} - 2.5 {a}^{4} {b}^{2} = 2.5 {a}^{2} {b}^{2} (5 - {a}^{2} \\ [/tex]
[tex] \sqrt{2 {t}^{2} } - \sqrt{50t} = t \sqrt{2} - 5 \sqrt{2t} = \sqrt{2} (t - 5 \sqrt{t} )[/tex]