1.
(a+1)2=a2+2a+1
2.
x2+4x+4=x2+2.x.2+22=(x+2)2
3.
512=(50+1)2=502+2.50+1=2500+100+1=2601
3012=(300+1)2=3002+2.300+1=90000+600+1=90601
1,(a+1)2
=a2+2a+12
2,x2+4x+4
=x2+2.2x.1+22
=x2+4x+22
=(x+2)2
3, mk ko hiểu đề cho lắm
k mk nhé !
Bài 1:
\(\left(a+1\right)^2=a^2+2a+1\)
Bài 2:
\(x^2+4x+4=\left(x+2\right)^2\)
Bài 3:
\(a.51^2=\left(50+1\right)^2=50^2+2\cdot50+1=2500+100+1=2601\)
\(b.301^2=\left(300+1\right)^2=300^2+2\cdot300+1=90000+600+1=90601\)