问题
解答题
分解因式:
(1)xy2-9x
(2)2x2-4x+2
答案
(1)xy2-9x,
=x(y2-9),
=x(y+3)(y-3);
(2)2x2-4x+2,
=2(x2-2x+1),
=2(x-1)2.
分解因式:
(1)xy2-9x
(2)2x2-4x+2
(1)xy2-9x,
=x(y2-9),
=x(y+3)(y-3);
(2)2x2-4x+2,
=2(x2-2x+1),
=2(x-1)2.