计算:(1)(6ab4)2÷(-2ab3)•(-frac{1}{2}abc2) (2)(t+1)(t-5)-t2(3)(a2b3-a2b2)÷(ab)2(
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计算:(1)(6ab4)2÷(-2ab3)•(-frac{1}{2}abc2) (2)(t+1)(t-5)-t2 (3)(a2b3-a2b2)÷(ab)2 (4)(5a-b2)2 (5)(a+2b-3)(a-2b+3)(6)(x+2)2(x-2)2. |
答案
(1)原式=36a2b8÷(-2ab3)•(-abc2) =9a2b6c2;
(2)原式=t2-5t+t-5-t2 =-4t-5;
(3)原式=(a2b3-a2b2)÷(a2b2) =b-1;
(4)原式=(5a)2-2•5a•b2+(b2)2 =25a2-10ab2+b4;
(5)原式=[a+(2b-3)][a-(2b-3)] =a2-(2b-3)2 =a2-4b2+12b-9;
(6)原式=[(x+2)(x-2)]2 =(x2-4)2 =x4-8x2+16. |
举一反三
(x2y5-5x)÷(-x)的值是( )A.-xy5-5 | B.xy5+5 | C.xy5-5 | D.-xy5+5 |
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计算:(4a3-6a2+9a)÷(-2a)的结果是______. |
计算:12x2y3z÷(-3xy2)=______. |
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