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24-05-2016
Mathematics

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Which expression is equivalent to -1?
A) -
x + y
x - y
B) -
x - y
-x + y
C) -
x - y
-x - y
D) -
x + y
-x + y

Respuesta :

24-05-2016

Hello,
Answer B

If x≠y then
[tex] \dfrac{x-y}{-x+y}=\dfrac{x-y}{-(x-y)}=-1 [/tex]

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