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Formule de calcul prescurtat
  • 1. (x-1)2=?
A) x2-x+1
B) x2-2x+2
C) x2-2x+1
D) x2+2x+1
  • 2. (x+2)2=?
A) x2+2x+4
B) x2-4x+4
C) x2+4x+2
D) x2+4x+4
  • 3. (x-3)2=?
A) x2-9x+6
B) x2-5x+9
C) x2+6x+9
D) x2-6x+9
  • 4. (2x+5)2=?
A) 4x2+20x+25
B) 4x2+10x+25
C) 4x2-20x+25
D) 2x2+20x+25
  • 5. (3x-2)2=?
A) 9x2-6x+4
B) 9x2-12x+2
C) 9x2-12x+4
D) 3x2-12x+4
  • 6. (2x2-3)2=?
A) 4x4-6x2+9
B) 4x4-12x2+9
C) 2x4-12x2+9
D) 4x4-12x2+3
  • 7. (x+3)(x-3)
A) x2+3
B) x2-3
C) x2+9
D) x2-9
  • 8. (3x-5)(3x+5)
A) 9x2-5
B) 9x2-25
C) 9x2+25
D) 3x2-25
  • 9. (2x2-1)(2x2+1)
A) 4x4-1
B) 2x4+1
C) 2x4-2
D) 4x2-1
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