Respuesta :

#21: Even
#23: Neither
minecraftwar

Answer:

21. y=x⁴ = even because y×x⁴=4xy 4 is a even number so it is even number

23. y=x+2=neither because y×x+2=2xy 2 is a even number but in the question there is = and + .=×+=+ so it is neither

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