[질문] 를인수분해해라

a*b=(a-2b)^2이므로(x*2y)-(3x*y)를정리하면(x-4y)^2-(3x-2y)^2입니다.이식을제곱차공식을이용해인수분해하면(x-4y-3x+2y)(x-4y+3x-2y)즉,(-2x-2y)(4x+2y)입니다