Question

3x^2+6xy+3y^2
4x^2-4y^2

Answer 1

1)3x^2+6xy+3y^2=3(х ^ 2 +2 ху + y^2)=3(х+у) ^2
2)4x^2-4y^2=4(x²-y²)=4(x+y)(x-y)