(1)因式分3x2-6xy+3y2;(2)化简:(x+2)2-(x+1)(x-1).
题型:解答题难度:一般来源:不详
(1)因式分3x2-6xy+3y2; (2)化简:(x+2)2-(x+1)(x-1). |
答案
(1)3x2-6xy+3y2, =3(x2-2xy+y2), =3(x-y)2;
(2)(x+2)2-(x+1)(x-1), =x2+4x+4-x2+1, =4x+5. |
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