问题
解答题
因式分
(1)2ax2-8axy+8ay2;
(2)6xy2-9x2y-y3.
答案
(1)2ax2-8axy+8ay2,
=2a(x2-4xy+4y2),
=2a(x-2y)2;
(2)6xy2-9x2y-y3,
=y(6xy-9x2-y2),
=-y(3x-y)2.
因式分
(1)2ax2-8axy+8ay2;
(2)6xy2-9x2y-y3.
(1)2ax2-8axy+8ay2,
=2a(x2-4xy+4y2),
=2a(x-2y)2;
(2)6xy2-9x2y-y3,
=y(6xy-9x2-y2),
=-y(3x-y)2.