Zadanie 2
299^2=(300-1)^2=300^2-2*300*1+1^2=90000-600+1=89401
297^2=(300-3)^2=300^2-2*300*3+3^2=90000-1800+9=88209
195^2=(200-5)^2=200^2-2*200*5+5^2=40000-2000+25=38025
103^2=(100+3)^2=100^2+2*100*3+3^2=10000+600+9=10609
805^2=(800+5)^2=800^2+2*800*5+5^2=640000+8000+25=648025
zastosowane wzory
(a+b)^2=a^2+2ab+b^2
(a-b)^2=a^2-2ab+b^2