Question

Vă rog mult ajutați-mă

Answer 1

51^2=(50+1)^2=50^2+2*50*1+1^2=2500+100+1
81^2=(80+1)^2=80^2+2*80*1+1^2=6400+160+1
49^2=(50-1)^2=50^2-2*50*1-1^2=2500-100+1
99^2=(100-1)^2=100^2-2*100*1+1^2=10000-200+1
72^2=(70+2)^2=70^2+2*70*2+2^2=4900+280+4
102^2=(100+2)^2=100^2+2*100*2+2^2=10000+400+4
88^2=(90-2)^2=90^2-2*90*2+2^2=8100-390+4
79*81=(80-1)(80+1)=80^2-1^2
59*61=(60-1)(60+1)=60^2-1^2
98*102=(100-2)(100+2)=100^2-2^2
198*202=(200-2)(200+2)=200^2-2^2
Sper ca nu am gresit corect
Daca nu sttii ce inseamna sagetiile in sus si alaturea 2 asta inseamna la puterea 2