simplify the expression so there is only one positive power for the base -5
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When we are dividing, exponents are subtracted!
The rule is shown below:
[tex]a^b\div a^c=a^{b-c}[/tex]We can apply this rule to this problem as shown:
[tex]\begin{gathered} -5^7\div-5^2 \\ =-5^{7-2} \\ =-5^5 \end{gathered}[/tex]