👤

11 ori( 5^{21} - 5^{20} - 5^{18} )=

Răspuns :

11 * 5^18(5^3-5^2-1) = 
11 * 5^18(125 - 25 - 1) = 
11 * 5^18(100-1) = 
11 * 5^18 * 99 = 
11(1*9)*5^18 = 
11 * 9 * 5^18