[질문] (2x-1)^2-9(y-1)^2 를 인수분해하면? 참고로^는몇승을뜻합니다

(2x-1)^2-9(y-1)^2 = (2x-1)^2 - {3(y-1)}^2 = {2x-1 + 3(y-1)}*{2x-1 - 3(y-1)} = (2x+3y-4)(2x-3y+2)