а) 89^2 = (64+25)^2= 64^2 + 2*64*25+25^2= 8^4 + 2*8*8*5*5 + 5^4 = 4096 + 3200 + 625 = 7921
b) 102^2= (100+2)^2= 100^2 + 400 + 2^2 = 10000+400+4=10404
a) (второй
а) 89^2 = (64+25)^2= 64^2 + 2*64*25+25^2= 8^4 + 2*8*8*5*5 + 5^4 = 4096 + 3200 + 625 = 7921
b) 102^2= (100+2)^2= 100^2 + 400 + 2^2 = 10000+400+4=10404
a) (второй