Question

64/81m²-(8/9+1/6n)(8/9m-1/6n)=​

Answer 1

Объяснение:

$\frac{64}{81} m {}^{2} - ( \frac{8}{9} + \frac{1}{6} n)( \frac{8}{9} m - \frac{1}{6} n) = \frac{64}{81} m {}^{2} - ( \frac{64}{81} m - \frac{4}{27} n + \frac{4}{27} mn - \frac{1}{36} n {}^{2} ) = \frac{64}{81} m {}^{2} - \frac{64}{81} m + \frac{4}{27} n - \frac{4}{27} mn + \frac{1}{36} n {}^{2}$