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emmasim [6.3K]
2 years ago
13

30 points !!!!!!!!!!!! HELPPPP!!!!!!!!! SIMPLIFY THE EXPRESSION!!!!!!!!!!!(9ab^-5)^-2

Mathematics
1 answer:
sergiy2304 [10]2 years ago
7 0

Answer:

\frac{ {b}^{10} }{ 81 {a}^{2} }

Step-by-step explanation:

(9ab^{-5})^{-2} \\  \\  =  {9}^{ - 2}  {a}^{ - 2}  {b}^{ - 5( - 2)} \\  \\  =  {9}^{ - 2}  {a}^{ - 2}  {b}^{10}  \\  \\  =  \frac{ {b}^{10} }{ {9}^{2}  {a}^{2} }  \\  \\  \huge =  \frac{ {b}^{10} }{ 81 {a}^{2} }

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