Ex4
A) 81^7:3^5^2=
=(3^4)^7:3^25
=3^28:3^25
=3^3
=27
B) 4^12:2^22-8^9:2^26=
=(2^2)^12:2^22-(2^3)^9:2^26
=2^24:2^22-2^27:2^26
=2^2-2^1
=4-2
=2
C) (25^2•5^4)^3:5^22-2^2^2
=[(5^2)^2•5^4)^3:5^22-2^4
=(5^4•5^4)^3:5^22-2^4
=(5^8)^3:5^22-2^4
=5^24:5^22-2^4
=5^2-2^4
=25-16
=9
Sper ca te-am ajutat
