Question

giugiups mik vs ạ mik cảm ơn

Answer 1

1) \(a^2+2a+1\)

\(=a^2+2.a.1+1^2\)

\(=\left(a+1\right)^2\)

2) \(4a^2-4ab+b^2\)

\(=\left(2a\right)^2-2.2a.b+b^2\)

\(=\left(2b-b\right)^2\)