Question

Все на фото, залишилось 2 години!

Answer 1

$\frac{x + 9}{x {}^{2} - 81 } = 0 \\ x∈∅$

$\frac{x - 5}{x + 3} = 0 \\ x = 5$

$\frac{x {}^{2} - 36}{x - 6} = 0 \\ x = - 6$

$( \frac{2m {}^{2} }{3n {}^{ - 3} } ) {}^{ - 3} \times 8m {}^{ - 4} n {}^{2} \\ ( \frac{3n {}^{ - 3} }{2m {}^{2} } ) {}^{3} \times 8m {}^{ - 4} n {}^{2} \\ \frac{27n {}^{ - 9} }{8m {}^{6} } \times 8m {}^{ - 4} n {}^{2} \\ \frac{27n {}^{ - 9} }{m {}^{10} } \times n {}^{2} \\ \frac{27n {}^{ - 7} }{m {}^{10} } = \frac{27}{m {}^{10} n {}^{7} }$