Question

ПАМАГИТЕ СТАВЛЮ 5 БАЛЛОВ!!!!!!!!!!!!!!!!!!!!!!

Answer 1

$\displaystyle \tt \bigg(8\frac{5}{12}\bigg)^2-\bigg(6\frac{7}{12}\bigg)^2=\bigg(8\frac{5}{12}-6\frac{7}{12}\bigg)\bigg(8\frac{5}{12}+6\frac{7}{12}\bigg)=\\\\\\ \displaystyle \tt =\bigg(\frac{101}{12}-\frac{79}{12}\bigg)\bigg(\frac{101}{12}+\frac{79}{12}\bigg)=\frac{22}{12}\cdot\frac{180}{12}=\frac{11}{1}\cdot\frac{15}{6}=\\\\\\ \displaystyle \tt =\frac{11}{1}\cdot\frac{5}{2}=\frac{55}{2}=\bold{27,5}$

Ответ: $\displaystyle \tt 27,5$