Răspuns :

Aurelcraciun59id

Răspuns:

Explicație pas cu pas:

x= 2,7= 27/10

y= 3/2

1/x= 1*10/27= 10/27

1/y= 1*2/3= 2/3

-

z= 10/27-⁹⁾2/3

z= 10/27-18/27

z= - 8/27

-

z*(x-y²)= - 8/27 *( ²⁾27/10 -⁵⁾9/4)= -8/27 *(54/20- 45/20)=-8/27 * 9/20=- 2/3 +1/5 = -2/15

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