计算:(1)-32+|-3|+(-1)2013×(π-3)0-(12)-1 (2)(x+3)2-(x-1)(x-2)(3)(a+1)(a-1)(a2+1)
题型:解答题难度:一般来源:不详
计算: (1)-32+|-3|+(-1)2013×(π-3)0-()-1 (2)(x+3)2-(x-1)(x-2) (3)(a+1)(a-1)(a2+1)( a4+1) (4)(a-2b-3c)(a-2b+3c) |
答案
(1)原式=-9+3-1-2=-9; (2)原式=x2+6x+9-(x2-3x+2)=x2+6x+9-x2+3x-2=9x+7; (3)原式=(a2-1)(a2+1)(a4+1)=(a4-1)(a4+1)=a8-1; (4)原式=(a-2b)2-9c2=a2-4ab+4b2-9c2. |
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