问题
解答题
分解因式:
(1)2a4-32
(2)x2(1-y)-2x(1-y)2-(y-1)3.
答案
(1)原式=2(a4-16)
=2(a2+4)(a2-4)
=2(a2+4)(a+2)(a-2);
(2)原式=x2(1-y)-2x(1-y)2+(1-y)3
=(1-y)[x2-2x(1-y)+(1-y)2]
=(1-y)(x-1+y)2.
分解因式:
(1)2a4-32
(2)x2(1-y)-2x(1-y)2-(y-1)3.
(1)原式=2(a4-16)
=2(a2+4)(a2-4)
=2(a2+4)(a+2)(a-2);
(2)原式=x2(1-y)-2x(1-y)2+(1-y)3
=(1-y)[x2-2x(1-y)+(1-y)2]
=(1-y)(x-1+y)2.