问题
解答题
(1)2x2y-8xy+8y
(2)a2(x-y)-4b2(x-y)
答案
(1)2x2y-8xy+8y,
=2y(x2-4x+4),
=2y(x-2)2;
(2)a2(x-y)-4b2(x-y),
=(x-y)(a2-4b2),
=(x-y)(a+2b)(a-2b).
(1)2x2y-8xy+8y
(2)a2(x-y)-4b2(x-y)
(1)2x2y-8xy+8y,
=2y(x2-4x+4),
=2y(x-2)2;
(2)a2(x-y)-4b2(x-y),
=(x-y)(a2-4b2),
=(x-y)(a+2b)(a-2b).