У (t-2) и (t+1) общий знаменатель будет (t-2)*(t+1)=t^2-t-2;
![\frac{2*(t+1)+4(t-2)}{(t-2)(t+1)} = \frac{6t-6}{(t-2)(t+1)} =\frac{6(t-1)}{(t-2)(t+1)}](https://tex.z-dn.net/?f=%20%5Cfrac%7B2%2A%28t%2B1%29%2B4%28t-2%29%7D%7B%28t-2%29%28t%2B1%29%7D%20%3D%20%5Cfrac%7B6t-6%7D%7B%28t-2%29%28t%2B1%29%7D%20%3D%5Cfrac%7B6%28t-1%29%7D%7B%28t-2%29%28t%2B1%29%7D)
t<>-1;
t<>2;
<span>121-36x² = (11-6х)(11+6х)
</span>x⁴y⁴-9 = (х²у²-3)(х²у²+3<span>)
</span>¹⁶/₄₉a² - ¹/₉b² = (⁴/₇а - ¹/₃b)(⁴/₇а + ¹/₃b)
Решение во вложенииииииииииииииииииииииииииииииииииииииии
-0,3*10000+4*100-59=-3000+400-59=-2659