(1)-a3•a4•a+(a2)4+(-a4)2 (2)(-3x2y)2 (-2xy3z)3 (3)(5a2b-3ab-1)(-3a2) (4)6x2-(x-1)(x+2)-2(x-1)(x+3) (5)5m×125m÷252m-1 (6)
问题描述:
(1)-a3•a4•a+(a2)4+(-a4)2
(2)(-3x2y)2 (-2xy3z)3
(3)(5a2b-3ab-1)(-3a2)
(4)6x2-(x-1)(x+2)-2(x-1)(x+3)
(5)5m×125m÷252m-1
(6)[x+2y)(x-2y)+4(x-y)2]÷6x.
答
(1)-a3•a4•a+(a2)4+(-a4)2 =-a8+a8+a8 =a8; (2)(-3x2y)2...