分解因式: (1)(x2+2x+3)(x2+2x+2)-30; (2)x2+2xy+y2-4x-4y-12; (3)x-y-x2+2xy-y2+2.
分解因式:
(1)(x2+2x+3)(x2+2x+2)-30;
(2)x2+2xy+y2-4x-4y-12;
(3)x-y-x2+2xy-y2+2.
(1)(x2+2x+3)(x2+2x+2)-30;
(2)x2+2xy+y2-4x-4y-12;
(3)x-y-x2+2xy-y2+2.
数学人气:601 ℃时间:2019-08-09 19:20:26
优质解答
(1)(x2+2x+3)(x2+2x+2)-30=(x2+2x)2+5(x2+2x)-14=(x2+2x-2)(x2+2x+7);(2)x2+2xy+y2-4x-4y-12=(x+y)2-4(x+y)-12=(x+y-6)(x+y+2);(3)x-y-x2+2xy-y2+2=(x-y)-(x-y)2+2=-[(x-y)2-(x-...
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