(1)3a/4b·16b/9a^2 (2)12xy/5a÷8x^2y (3)(-3xy)÷2y^2/3x (4)x+y/
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(1)3a/4b·16b/9a^2 (2)12xy/5a÷8x^2y (3)(-3xy)÷2y^2/3x (4)x+y/x-yx·yx-y/x+y
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![(1)3a/4b·16b/9a^2 (2)12xy/5a÷8x^2y (3)(-3xy)÷2y^2/3x (4)x+y/](/uploads/image/z/7390376-8-6.jpg?t=%281%293a%2F4b%C2%B716b%2F9a%5E2+%282%2912xy%2F5a%C3%B78x%5E2y+%283%29%28-3xy%29%C3%B72y%5E2%2F3x+%284%29x%2By%2F)
(1)3a/4b·16b/9a^2
=4/(3a)
(2)12xy/5a÷8x^2y
=(12xy)/(5a)·1/(8x^2y)
=3/(10ax)
(3)(-3xy)÷2y^2/3x
=(-3xy)·(3x)/(2y^2)
=-9x²/(2y)
(4)x+y/x-yx·yx-y/x+y
=(x+y)/(x-yx)·(yx-y)/(x+y)
=(xy-y)/(x-xy)
=4/(3a)
(2)12xy/5a÷8x^2y
=(12xy)/(5a)·1/(8x^2y)
=3/(10ax)
(3)(-3xy)÷2y^2/3x
=(-3xy)·(3x)/(2y^2)
=-9x²/(2y)
(4)x+y/x-yx·yx-y/x+y
=(x+y)/(x-yx)·(yx-y)/(x+y)
=(xy-y)/(x-xy)
(1)3a/4b·16b/9a^2 (2)12xy/5a÷8x^2y (3)(-3xy)÷2y^2/3x (4)x+y/
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