Question

Pls answer fast no wrong answers pls

Answer 1

3 ^-7-(-10) * 3^-5
=3^3*3^-5
=3^3-5
=3^-2
=1/3^ 2
=1/9

Answer 2

Answer:

$1. \: ( \frac{ {3}^{ - 7} }{ {3}^{ - 10} } ) \times {3}^{ - 5} = {3}^{ - 7 - ( - 10)} \times {3}^{ - 5} \\ = {3}^{ - 7 + 10} \times {3}^{ - 5} \\ = {3}^{3} \times {3}^{ - 5} \\ = {3}^{3 + ( - 5)} \\ = {3}^{3 - 5} \\ = {3}^{ - 2} \\ = \frac{1}{ {3}^{2} } \\ = \frac{1}{9}$

$2. \: \: {( \frac{ - 1}{5}) }^{ - 5} \times {( \frac{ - 1}{5}) }^{ - 7} \\ = {( \frac{ - 1}{5} )}^{ - 5 - 7} \\ = {( \frac{ - 1}{5} )}^{ - 12} \\ = {( - 5)}^{12}$