Ответ:
(1000+1)²=1000²+2*1000*1+1²=1000000+2000+1=1002001
(10+1)²=10²+2*10*1+1²=100+20+1=121
(20+1)²=20²+2*20*1+1²=400+40+1=441
(20-1)²=20²-2*20*1+1²=400-40+1=361
(30-1)²=30²-2*30*1+1²=900-60+1=841
(50-1)²=50²-2*50*1+1²=2500-100+1=2401
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Ответ:
(1000+1)²=1000²+2*1000*1+1²=1000000+2000+1=1002001
(10+1)²=10²+2*10*1+1²=100+20+1=121
(20+1)²=20²+2*20*1+1²=400+40+1=441
(20-1)²=20²-2*20*1+1²=400-40+1=361
(30-1)²=30²-2*30*1+1²=900-60+1=841
(50-1)²=50²-2*50*1+1²=2500-100+1=2401