[{(-2/5)^-7 × (-2/5)^9}÷(-2/5^2] and express the result as a power of 5
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[(-2/5)^-7×(-2/5)^9]÷(-2/5)²
a^m×a^n=a^m+n
(-2/5)^-7+9=(-2/5)^2=4/25
4/25÷4/25=4/25×25/4
=1 or(1)^5
a^m×a^n=a^m+n
(-2/5)^-7+9=(-2/5)^2=4/25
4/25÷4/25=4/25×25/4
=1 or(1)^5
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