Răspuns :
a)
[tex] {(40 + 1)}^{2} = 1600 + 80 + 1 = 1681[/tex]
b)
[tex] {(60 - 1)}^{2} = 3600 - 120 + 1 = 3481[/tex]
c)
[tex] {(50 + 1)}^{2} = 2500 + 100 + 1 = 2601[/tex]
d)
[tex] {(40 - 2)}^{2} = 1600 - 160 + 4 = 1444[/tex]
e)
[tex] {(60 + 2)}^{2} = 3600 + 240 + 4 = 3444[/tex]
[tex] {(40 + 1)}^{2} = 1600 + 80 + 1 = 1681[/tex]
b)
[tex] {(60 - 1)}^{2} = 3600 - 120 + 1 = 3481[/tex]
c)
[tex] {(50 + 1)}^{2} = 2500 + 100 + 1 = 2601[/tex]
d)
[tex] {(40 - 2)}^{2} = 1600 - 160 + 4 = 1444[/tex]
e)
[tex] {(60 + 2)}^{2} = 3600 + 240 + 4 = 3444[/tex]
a) (11+30)²=11²+2·11·30+30²=121+2·30·11+900=121+660+900=1560+121=1681
b)(50+9)²=50²+2·50·9+9²=2500+900+81=3481
c) 51²=50²+2·50·1+1²=2500+100+1=2601
d)38²=30²+2·30·8+8²=900+480+64=1444
e)62²=60²+2·60·2+2²=3600+240+4=3844
b)(50+9)²=50²+2·50·9+9²=2500+900+81=3481
c) 51²=50²+2·50·1+1²=2500+100+1=2601
d)38²=30²+2·30·8+8²=900+480+64=1444
e)62²=60²+2·60·2+2²=3600+240+4=3844