因式分解:(1)x4-9x2(2)25x2y+20xy2+4y3(3)x2(a-1)+y2(1-a

因式分解:(1)x4-9x2(2)25x2y+20xy2+4y3(3)x2(a-1)+y2(1-a)
2024-11-22 16:31:35
推荐回答(1个)
回答1:

(1)原式=x2(x2-9)=x2(x+3)(x-3);
(2)原式=y(25x2+20xy+4y2)=y(5x+2y)2
(3)原式=(a-1)(x2-y2)=(a-1)(x+y)(x-y).