Cours Stage - Factoriser, égalités remarquables
QCM
  • 1
  • 2
  • 3
  • 4
  • 5

L'énoncé

Cocher la bonne réponse.


Tu as obtenu le score de


Question 1

$10x+5=$

$10(x+1)$

$5(x+1)$

$5(2x+1)$

$10x+5=5\times 2x +5\times 1$

$10x+5=5(2x+1)$

Question 2

$5(x+3)+(5x+3)(x+3)=$

$(x+3)(5x+8)$

$5(x+3)+(5x+3)(x+3)=(x+3)[5+(5x+3)]$

$5(x+3)+(5x+3)(x+3)=(x+3)(5x+8)$

$(x+3)(25x+8)$

$(x+3)(5x+3)$

Question 3

$5(x+3)-(5x+3)(x+3)=$

$(x+3)(5x-8)$

$(x+3)(-5x+2)$

$5(x+3)-(5x+3)(x+3)=(x+3)[5-(5x+3)]$

$5(x+3)-(5x+3)(x+3)=(x+3)[5-5x-3]$

$5(x+3)-(5x+3)(x+3)=(x+3)(-5x+2)$

$(x+3)(-5x-7)$

Question 4

$(2x+5)(x+3)+(x+3)(5x+3)=$

$(x+3)(7x+8)$

$(2x+5)(x+3)+(x+3)(5x+3)=(x+3)[(2x+5)+(5x+3)]$

$(2x+5)(x+3)+(x+3)(5x+3)=(x+3)(7x+8)$

$(x+3)(7x+15)$

$(x+3)(10x+15)$

Question 5

$(x+3)^2+(x+3)(5x+3)=$

$(x+3)(5x+3)$

$(x+3)(6x+6)$

$(x+3)^2+(x+3)(5x+3)=(x+3)(x+3)+(x+3)(5x+3)$

$(x+3)^2+(x+3)(5x+3)=(x+3)[(x+3)+(5x+3)]$

$(x+3)^2+(x+3)(5x+3)=(x+3)(6x+6)$

$(x+3)(5x+6)$