Question

factorization
x2+2xy+y2-9​

Answer 1

$\\ \sf\longmapsto x^2+2xy+y^2-9$

$\boxed{\sf (a+b)^2=a^2+b^2+2ab}$

$\\ \sf\longmapsto (x+y)^2-9$

$\\ \sf\longmapsto (x+y)^2-3^2$

Answer 2

Hope this helped!! :))