Question

(-5)2x(-5)4
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[(-5)2]6

Answer 1

Ola Carol 

(-5)^2 = 25 

(-5)^4 = 625 

((-5)^2)^6 = (-5)^12  = 5^12

5^2*5^4/5^12 = 5^(2 + 4 - 12) = 5^-6