[질문] x제곱-xy-6x+3y+9를 인수분해하면요??

x^2-xy-6x+2y+9=x^2-6x+9-(xy-3y)=(x-3)^2-y(x-3)=(x-3)(x-3-y)=(x-3)(x-y-3)입니다.(^표시는제곱을표현한것입니다)