来自曹兰兰的问题
计算下列各式:(1)(-2x2y3)2•(xy)3(2)(x+y)(x2-xy+y2)(3)(x+2y-3)(x-2y+3)(4)(4a2b7+3a3b8-4a2b6)÷(-2ab3)2(5)4(x+1)2-2(x+5)(x-5)
计算下列各式:
(1)(-2x2y3)2•(xy)3
(2)(x+y)(x2-xy+y2)
(3)(x+2y-3)(x-2y+3)
(4)(4a2b7+3a3b8-4a2b6)÷(-2ab3)2
(5)4(x+1)2-2(x+5)(x-5)
1回答
2020-09-0903:04