因式分(1)(x-y+z)2-(x+y-z)2(2)x3+6x2+11x+6.
题型:解答题难度:一般来源:不详
因式分 (1)(x-y+z)2-(x+y-z)2 (2)x3+6x2+11x+6. |
答案
(1)原式=【(x-y+z)+(x+y-z)】【(x-y+z)-(x+y-z)】=2x•(-2y+2z)=-4x(y-z); (2)原式=x3+6x2+9x+2x+6 =x(x+3)2+2(x+3) =(x+3)[x(x+3)+2] =(x+3)(x2+3x+2) =(x+3)(x+1)(x+2). |
举一反三
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