问题
解答题
因式分x2(y2-1)+2x(y2-1)+(y2-1).
答案
x2(y2-1)+2x(y2-1)+(y2-1),
=(y2-1)(x2+2x+1),
=(y2-1)(x+1)2,
=(y+1)(y-1)(x+1)2.
因式分x2(y2-1)+2x(y2-1)+(y2-1).
x2(y2-1)+2x(y2-1)+(y2-1),
=(y2-1)(x2+2x+1),
=(y2-1)(x+1)2,
=(y+1)(y-1)(x+1)2.