Срочно плз !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Question

Срочно плз !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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Comments

а второе?

Answer 1

(х^2)×у^2×(2x-5y)/7x^2y^2= (х у сокращаются) =(2х-5у)/7
Подставляем
(2×0,28+5×2,1)/7=(0,56+10,5)/7=11,06/7=1,58