[질문] x³+x -2 를인수분해하면?

x³+x -2=x³-1+x-1=(x-1)(x² + x + 1) + (x - 1) = (x - 1)(x² + x + 1 + 1) = (x - 1)(x² + x + 2)입니다.새해복많이받으세요^^