问题:
计算:
(1)|(x+y) 2-(x-y) 2|÷3xy
(2)(a 3b 2+2a 4b 3-3a 3b 4)÷(-
1
2
a 3b 2)
(3)(3x-y)(3x+y)+y(x+y),其中x=-1,y=1.
计算:
(1)|(x+y) 2-(x-y) 2|÷3xy
(2)(a 3b 2+2a 4b 3-3a 3b 4)÷(-
a 3b 2)
(3)(3x-y)(3x+y)+y(x+y),其中x=-1,y=1.
(1)|(x+y) 2-(x-y) 2|÷3xy
(2)(a 3b 2+2a 4b 3-3a 3b 4)÷(-
1 |
2 |
(3)(3x-y)(3x+y)+y(x+y),其中x=-1,y=1.
参考答案: