\[Дано:6,2 < a < 6,3;\ \ \]
\[1,0 < b < 1,2.\]
\[Оценить:\ \ a^{2} - b^{2}\ - ?\]
\[Решение:\]
\[38,44 < a^{2} < 39,69;\ \ \ \ \ \]
\[1 < b^{2} < 1,44\]
\(\text{\ \ \ \ \ \ \ \ \ \ \ \ }\)
\[- 1 > - b^{2} > - 1,44\]
\[+\]
\[\ \ \ \ \ 37 < a^{2} - b^{2} < 38,69\]
\[Ответ:37 < a² - b^{2} < 38,69.\]