(1)(a-2b+3c)2-(a+2b-3c)2; (2) [ab(3-b)-2a(b- 1 2 b2)](-3a2b3) ; (3)-2100×0.5100×(-1)2013÷(-1)-5; (4)[(x+2y)(x-2y)+4(x-y)2-6x]÷6x; (5)5a2-[a2+(5a2-2a)-2(a2-3a)]. 题型:解答题难度:中档来源:不详 答案 (1)(a-2b+3c)2-(a+2...
(1)(a-2b+3c)2-(a+2b-3c)2; (2) [ab(3-b)-2a(b- 1 2 b2)](-3a2b3) ; (3)-2100×0.5100×(-1)2013÷(-1)-5; (4)[(x+2y)(x-2y)+4(x-y)2-6x]÷6x; (5)5a2-[a2+(5a2-2a)-2(a2-3a)]. 题型:解答题难度:中档来源:不详 答案 (1)(a-2b+3c)2-(a+2...