计算:(1)-32×0÷3-2+|-27|(2)(2x2y)3-(-7xy2)÷(14x4y3)(3)(x-5)2-(x-2)(x-3)(4)[(a+b)(a-
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计算: (1)-32×0÷3-2+|-27| (2)(2x2y)3-(-7xy2)÷(14x4y3) (3)(x-5)2-(x-2)(x-3) (4)[(a+b)(a-b)+(a+b)2-2a2]÷(-2a) |
答案
(1)原式=-9×1÷+27 =-81+27 =-54;
(2)原式=(8x6y3)•(-7xy2)÷(14x4y3) =-4x3y2;
(3)原式=x2-10x+25-(x2-3x-2x+6) =x2-10x+25-x2+3x+2x-6 =-5x+19;
(4)原式=(a2-b2+a2+2ab+b2-2a2)÷(-2a) =2ab÷(-2a) =-b. |
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