Question

X^2+12y-y^2-36

Giải hộ em với 

Answer 1

\(=x^2-\left(y-6\right)^2=\left(x-y+6\right)\left(x+y-6\right)\)

Answer 2

\(x^2+12y-y^2-36=x^2-\left(y^2-12y+36\right)=x^2-\left(y-6\right)^2=\left(x-y+6\right)\left(x+y-6\right)\)

Answer 3

\(=\left(x-y+6\right)\left(x+y-6\right)\)