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ex 2 de la testul 1 dau coroana

Ex 2 De La Testul 1 Dau Coroana class=

Răspuns :

{ -3 ×[ -7×(15-10-2)-3×(-8)+5]+20-4}×(+2)=
= {-3× [ -7×3-3×(-8)+5]+20-4}×2
= [ -3× ( -21+24+5)+20-4]×2
= ( -3×8+20-4)×2
=(-24+20-4)×2
= -8×2
= -16