Question

[Phạm Đăng Anh]

Mn giúp mình với mình đang cần gấp

Answer 1

[Tô Mì]

a/ \(\left(x-3\right)^2+6\left(x-3\right)+9\)

\(=\left(x-3\right)^2+2.\left(x-3\right).3+3^2\)

\(=\left(x-3+3\right)^2=x^2\)

==========

b/ \(\left(x+2021\right)^2+2\left(x+2021\right)\left(x-2021\right)+\left(x-2021\right)^2\)

\(=\left(x+2021+x-2021\right)^2=4x^2\)

===========

c/ \(2022^2-2.2021.2022+2021^2\)

\(=\left(2022-2021\right)^2=1\)

==========

d/ \(\left(x+44\right)^2-88\left(x+44\right)+1936\)

\(=\left(x+44\right)^2-2.\left(x+44\right).44+44^2\)

\(=\left(x+44-44\right)^2=x^2\)

Answer 2

[Nguyễn Lê Phước Thịnh]

d: Ta có: \(\left(x+44\right)^2-88\left(x+44\right)+1936\)

\(=\left(x+44-44\right)^2\)

\(=x^2\)