化简:5*a‘2/5ab= ,9a*b'2+6abc/3*a'2*b= ,(x+y)y/x*y'2=

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化简:5*a‘2/5ab=,9a*b''2+6abc/3*a''2*b=,(x+y)y/x*y''2=化简:5*a‘2/5ab=,9a*b''2+6abc/3*a''2*b=,(x+y)y/x*y''2=化简:5

化简:5*a‘2/5ab= ,9a*b'2+6abc/3*a'2*b= ,(x+y)y/x*y'2=
化简:5*a‘2/5ab= ,9a*b'2+6abc/3*a'2*b= ,(x+y)y/x*y'2=

化简:5*a‘2/5ab= ,9a*b'2+6abc/3*a'2*b= ,(x+y)y/x*y'2=
化简:
5a^2/5ab=a/b
9ab^2+6abc/3a^2b=9ab^2+2c/a
(x+y)y/xy^2=(x+y)/xy=1/x+1/y