Răspuns :

Miky93id
E(√2) = 2* (√2)³ -3* (√2)² - 3*√2 +6

=4√2 -3*2 -3√2 +6

=4√2 -3√2 -6 +6

=4√2-3√2

=√2

6) | x+1/2| =0   ∧  | y-1/2|=0

x+1/2=0    ∧  y -1/2 =0
x= -1/2            y= 1/2

x*y=  (-1/2) * (1/2)= -1/4

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