看不懂题目,不知道要求做什么,请补充完整.是做整式、分式划分,还是做因式分解?
(1)-x^-2 =-1/x^2
(2)2x^2y^-3=2x^2/y^3
(3)5xy(x+y)^-2=5xy / (x+y)^2
(4)4^-3a^-1b^2=b^2/(64a)
(5)-xy分之2 =-2/xy
(6)x+2y分之2x =2x/(x+2y)
(7)2a^2b^3分之a+b
=(a+b)/2a^2b^3
(8)x^2y^2(x^2+y^2)
=x^4y^2+x^2y^4
(9)(-a^2)^3乘以(-a^3)^-2
=(-a^6)乘以(1/a^6)
=-1
(10)(2ab^2)^2乘以(3ab)^-3
=(4a^2b^4)乘以(1/27a^3b^3)
=(4b)/(27a)