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Efectuati respectand ordinea efectuari operatiilor (x+3)la putereaa a 2 +2(2x-3)(2x+3)-(3x-2)la puterea a 2

Răspuns :

(x la patrat+6x+9)+2(4x patrat-9)-(9x patrat-12x+4)=
x pătrat+6x+9+8x pătrat-18-9x pătrat+12x-4=
18x-13
  (x+3)² + 2(2x-3)(2x+3) - (3x-2)² =
=x²+6x+9  +  8x²-18  - 9x²+12x-4 =
=  18x -13