Question

What is the answer please (m+n)²-6(m+n)+9

Answer 1

Respuesta:

$m^2+2mn+n^2-6m-6n+9$

Explicación:

$(m+n)^2-6(m+n)+9\\= m^2+2mn+n^2-6(m+n)+9\\=m^2+2mn+n^2-6m-6m+9$